87 octane in vehicle requiring 93 what happens?

If you usually fill your tank up with 87-octane gasoline and you accidentally put in a higher octane blend (say, 91, 92, or 93), don’t worry. You’re actually filling your car or truck with a different blend of gas, which means it will burn differently in your engine.


  • Putting 93 octane fuel in an 87 octane automobile is a waste of money but will not harm the vehicle. When you use 87 octane in a 93 octane automobile, you risk pinking and damaging the engine. For optimal performance and fuel economy, choose 88-92 grade gasoline for your vehicle.

What happens if you put the wrong octane gas in your car?

Using the wrong gasoline may cause other problems, like decreased fuel economy and engine performance. If the octane rating is less than 91, you could damage the engine and may void your vehicle warranty. If heavy knocking is heard when using gasoline rated at 91 octane or higher, the engine needs service.”

Can you mix regular gas with 93?

Yes, drivers can mix the two types of fuel. The combined gas types will result in an octane level somewhere in the middle — something the vehicle “will survive,” according to The Drive.

Is 87 and 93 gas the same?

Regular gas is rated at 87 octane in most states, while premium gas is often rated higher at 91 or 93. Fuel with a higher octane rating can stand up to higher compression before it detonates. Essentially, the higher the octane rating, the lower the likelihood that detonation happens at the wrong time.

What happens if you put 93 gas instead of 87?

Each engine is designed to run correctly on any fuel above the minimum octane rating. Generally higher compression, and hence higher performance engines run better on higher octane. Octane is resistance to pre ignition or knock. If the engine does not knock on 87 octane, it also will not knock on 93 octane fuel.

What type of gas is 93?

Premium gas is usually considered to be any gasoline that has an octane level of 91 or higher. You’ll usually see these listed on pumps as 91 or 93. Sometimes, 93 octane will be listed as “super-premium” or “ultra.” Unleaded gasoline is usually considered to be “regular” when it is 87 octane.

What happens if you put 87 in a BMW?

Regular gas is lower octane, usually 87 or 88. Putting low octane fuel in a car with a high-compression engine could cause the engine to knock or ping, which could cause major damage if it goes on for a long time.

Will premium gas clean my engine?

Nope. Regular, plus, and premium gas all come with detergents to mitigate against carbon deposits in your engine. Plus and premium don’t come with special powers for cleaning out the engine. If you’re interested in cleaning out your engine, you’re better off taking it in for service.

Does premium gas do anything?

Typically, high-performance cars require premium, because their engines have higher compression ratios, while other cars can run just fine on lower octane gas. The FTC sums it up this way: “In most cases, using a higher octane gasoline than your owner’s manual recommends offers absolutely no benefit.”

Does 93 octane gas last longer?

93 octane fuels are more refined and contain more stable hydrocarbons. These stable hydrocarbons can last 2-3 times longer than 87 octane fuel. Even in proper storage 87 octane gas can start to degrade in 3 months, 93 octane fuel should last closer to 9 months before degradation is noticeable.

Can you put 93 in a car that takes 91?

If you mix equal quantities of 93 and 91 octane fuel, you have a tank of 92 octane. Your car requires 91 OR higher, so you don’t need to mix anything, just run 91 and all will be fine.

What happens if I put regular gas in my Mercedes?

While regular unleaded gas shaves a few dollars off filling up your tank, Mercedes-Benz engines require premium gas due to their high-compression ratios. This means using regular gas may lead to costly repairs. To avoid more repair bills outside of scheduled service, you should always fill up with premium fuel.

What Happens If You Use Regular Gas Instead of Premium?

Tempting the automotive maintenance gods is never a smart idea, but there are occasions when you just cannot find a pump with premium gasoline when you need it. The stress of trying to figure out what the consequences will be for your automobile might be overwhelming if you’ve ever found yourself in one of these situations. The good news is that, in the vast majority of situations, nothing negative will occur. Although we are not scientists, the Drive’scrack informative crew has been in this position many times, and while we are not experts in this field, we have accumulated a significant number of white-knuckle miles spent skipping over the desert in search of a better gas station.

In such case, what will happen if you fill up with ordinary gasoline?

Please bear with us while we explain the differences between premium and ordinary fuel, as well as how each impacts the performance of your car.

Premium vs. Regular Gas

It is possible that The Drive and its partners will get a commission if you purchase a product after clicking on one of our affiliate or referral links. More information may be found here. Comprehending the different types of gasoline comes down to understanding the octane ratings of the various fuels available today. Depending on where you live, premium gasoline might be classified as being 91 or 93 octane (although there are some locations in the nation where the octane is higher than 93), while normal fuel is described as being 87 octane (although there are some places in the country where the octane is higher than 87).

Higher octane ratings suggest that there is less likelihood that combustion may occur at an inopportune moment in the engine’s operation.

Higher octane gasoline is intended to help minimize engine knocking by reducing friction.

What Happens If You Put the Wrong Octane of Gas In Your Car?

While it used to be that driving an 87-octane gas in a car that required premium gasoline would cause the engine to knock before you even got out of the parking lot, things have changed dramatically in recent years. If you fill up your car with ordinary fuel by accident, the engine control unit (ECU) will change the timing and performance of the engine to accommodate the lower-octane fuel. In most circumstances, this is OK for short periods of time when there are no premium gas stations nearby, but it is not recommended to use the cheapest gasoline available for lengthy periods of time.

DepositPhotos Modern engines are capable of withstanding the occasional fill-up with the incorrect gasoline.

Does Premium Gas Give Better Mileage?

The quick answer is that utilizing higher octane fuel is unlikely to result in a notable improvement in performance. It is true that using the right octane rating for your car may help it function as intended, which may have the side effect of improving fuel efficiency, but this will not be a significant enough advantage to warrant the use of more costly fuel to begin with.

Why Does My Car Require Premium Fuel?

Depending on the sort of vehicle you drive, the need to utilize premium gasoline might be triggered by a variety of variables. Your vehicle may be equipped with a turbocharged engine that requires higher octane fuel to work effectively, or you may have chosen a high-performance vehicle with a highly strung engine that runs within tight tolerances. In any event, if your vehicle’s gas cap or owner’s handbook instructs you to use premium gasoline, follow their instructions.

Pro Tips To Mix Premium Gas With Regular Gas

Contributors to The Drive have experienced being stranded without access to a premium fuel pump in the past, and they can attest that both the driver and the car will survive a trip on standard gas. When two different octane fuels are combined, the resulting tank of fuel will have an octane rating that is somewhere in the middle of the two fuels, depending on the volumes of each. If your car is equipped with premium gasoline, it’s a good idea to refill the tank with the high-quality fuel as soon as you are able to do so.

However, make sure you have enough fuel to get you to your destination.

DepositPhotos The majority of gas stations provide at least a couple different types of gas to choose from.

Fuel Safety

You may already be aware that it is foolish to smoke while filling up your vehicle’s gas tank, but there are a few more considerations to bear in mind when filling up:

  • Do not attempt to fill the petrol tank of your car. While clicking the pump on and off may provide you with the satisfaction of knowing your tank is full, it may also result in problems as fuel leaks into areas of your vehicle where it is not supposed to
  • If you find yourself tempted to deplete your petrol tank, make sure you do it in a safe manner. It is best to work in a well-ventilated environment and avoid storing fuel near open flames. Aside from that, it should go without saying that you should never, ever siphon fuel from your tank with your mouth. As quickly as possible, wash any gasoline that has come into contact with your skin or clothing. It has the potential to irritate your skin and produce rashes or other complications.

DepositPhotos Premium gasoline is significantly more costly than normal fuel.

FAQs About Gas Mileage

Your questions are addressed by The Drive, which provides responses.

Q:Do turbocharged cars need premium fuel?

The use of premium gasoline for turbocharged automobiles is generally recommended by the manufacturers, in most cases. Check your owner’s manual for information on your vehicle’s specifications, including the type of petrol you should use.

Q:What is Top Tier gas?

A:Top Tier is a branding and marketing word and moniker that is used by a small number of gas firms, but it does not necessarily refer to high-quality natural gas. “A fuel performance standard developed by vehicle manufacturers to aid in keeping the engine cleaner, resulting in an enhanced customer experience,” according to the Top Tier website.

Because automobile manufacturers are unable to prescribe fuel rules or fuel standards, the TOP TIERTM emblem serves as a signal of a station where the gasoline marketer is supportive and is willing to accommodate the car manufacturers’ desire for higher fuel requirements.”

Q: Does old gas reduce fuel mileage and performance?

A. According to Exxon, gas that has been sealed in an authorized container has a shelf life of approximately six months before it begins to degrade and lose its combustibility. A. A. With time, it may begin to decay and lose some of its efficacy, which may result in slight reductions in fuel mileage and a decrease in overall performance. With this tutorial, How To Dispose of Old Gas, you’ll learn how to remove and transfer fuel from your vehicle.

Watch: Premium vs. Regular Fuel Tested

In this video, Jason Fenske of Engineering Explained puts gasoline to the test.

Wrong gas in car

Jason Fenske, host of Engineering Explained, puts gasoline to the test in this episode.

Modern cars and compensate for the wrong gas

Car computers are unable to determine what type of gas you have in your tank. This device can only tell you how well the gas performs in your engine. Using the knock sensor, the computer will identify the difference between using a high performance, high compression engine and filling it with low 87 octane gas. Due to the fact that it detects knock signals induced by detonation (in which gas ignites from the heat of compression rather than from the spark plug), it retards ignition timing in order to minimize the occurrence of double ignition–one from the heat of compression and another from the spark.

  1. The computer will issue a fault code and illuminate your check engine light when it has retarded the spark timing by a particular amount and still detects knock after doing so.
  2. Nothing.
  3. Your objective is to avoid knocking by driving gently, to use up at least a quarter of the tank as rapidly as feasible, and to replenish with a higher octane gasoline.
  4. It is not necessary to use an octane booster to remedy this issue.

Will the check engine light go out on its own?

If the issue code flashed shortly after you filled your car with the incorrect gas and you’ve subsequently filled it with the correct gas, the computer will gradually adapt and the light will go off, indicating that the problem has been resolved.

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What causes engine knock?

Power has absolutely nothing to do with octane. Higher octane gasoline simply resists igniting too early in high compression engines, which is why it is preferred. When used in a high-performance engine with high compression, 87 octane will self-ignite due to the heat generated by the compression process during the compression cycle. The computer will recognize this as a misfire, and the incomplete combustion gases will be sent down to the catalytic converter for further processing and disposal.

Unfortunately, all of that extra unburned fuel boosts the temperatures inside the converter, sometimes to the point where the valuable metals contained therein are vaporized or completely melted.

The computer will attempt to adjust by delaying the time in order to make the spark event more nearly resemble the real combustion event.

You may also see a Check Engine light on in conjunction with misfire codes. It’s a horrible idea from every angle. You stand to gain nothing, and you run the risk of causing damage to the catalytic converter. Rick Muscoplat was born in the year 2012. Rick Muscoplat posted a blog entry on

What happens if you put 87 gas in a 93 car?

Asked in the following category: General The most recent update was made on March 16, 2020. In the event that you normally fill your tank with 87-octane gasoline and you mistakenly put in a higher-octane mix (such as91, 92, or93), don’t be concerned. You’re really filling your vehicle or truck with a different blend of gas, which means it will burn differently in your engine as a result of your choice. When used in a high-performance engine with high compression, 87octane will spontaneously ignite because to the heat generated by compression during the compression cycle.

  1. Any unburned gases will be burnt off at this location.
  2. Premium gas has a higher octane rating than normal gas; in other words, it has a greater resistance to explosion than regular gas.
  3. Furthermore, what happens if you put 87 octane petrol in a 91 octane car?
  4. If your engine’s octane rating is less than 91, you run the risk of damaging it and voiding your vehicle’s warranty.
  5. Adding a half tank of 91 octane to a half tank of 89 octane will result in a whole tank of 90 octane after the mixture is complete.
  6. Aside from the octane booster, all three kinds of gasoline are identical to one another.

If Premium Gas Is Recommended for My Car, Will Using Regular Void the Warranty, Ruin the Engine?

CARS.COM is a website dedicated to automobiles. Premium gas is, without a doubt, more costly. Premium fuel is often priced substantially more than regular petrol, and filling up with it might have a major negative impact on your bank account. The temptation to simply fill up with standard petrol is strong, especially as the price of gasoline continues to climb. The use of premium gasoline in some vehicles, however, has been encouraged by the manufacturers, leading many drivers to question if this is required or if it is simply a ploy for oil corporations to earn more money from fuel that is more expensive per gallon.

Listed below is some information you should be aware of.

Does it really make a difference if you use premium fuel? Is it possible that not using premium fuel may void your warranty or cause harm to your engine? You might be surprised by some of the answers. Continue reading to find out the truth before your next trip to the petrol station.

What If the Manufacturer Requires It?

Typically, when a car manufacturer specifies that premium gasoline be used, it is because the fuel system of that specific vehicle is built to perform best with higher octane gas. Using standard gas in an engine that is designed to run on premium gas might jeopardize your vehicle’s warranty. That is most likely to occur if using regular results in significant engine knock or pinging (premature ignition of the gasoline, also known as detonation), which destroys the pistons or other engine components, as described above.

For example, the following is what General Motors says about the matter in an owner’s handbook for a car that requires premium fuel: “Make use of premium unleaded gasoline with an octane rating of 91 or higher on the label.

When using gasoline with an octane rating of 91 or higher, significant knocking can be heard, which indicates that the engine needs to be serviced.” Please keep in mind that this only applies to engines that demand premium gas.

In most cases, they advise that using lower-octane gas may result in decreased performance and fuel economy.

Differences Between Premium and Regular Gas

Premium gas is comparable to ordinary unleaded gasoline in appearance. Both are derived from crude oil and are extremely flammable when ignited. One of the most noticeable distinctions is that premium gasoline has a higher octane rating than regular gasoline. The majority of premium gasoline has an octane rating of 90 or above. Octane is critical when it comes to delivering maximum power while avoiding banging on the road. Whenever gasoline and air ignite before they should, an explosion known as pre-ignition occurs, which results in the production of a knocking sound.

Premium gasoline has an octane rating of 90 or higher, making it less prone to pre-ignition and knocking.

In addition, the use of chemicals and detergents results in reduced pollution.

The Bottom Line

In certain cases, the computers that control contemporary engines are capable of adjusting the ignition system to handle lower-octane fuel, but only up to a point. With ordinary gas, it is expected that fuel efficiency and acceleration will suffer at least a modest decrease. Because normal gasoline has a lower octane rating, it is more susceptible to explosion. On a long-term basis or under extreme loads, using regular in an engine built for premium fuel can result in engine knock, which can cause damage to the pistons, valves, and spark plugs.

  • Regular may be used at least periodically without causing problems in most premium cars, although it is not recommended to do so on a regular basis.
  • If the car manufacturer states that premium fuel is required for the engine, take their word for it.
  • It is possible that doing so will result in substantially higher expenditures in the future.
  • Editors and reviewers at Cars.com are prohibited from accepting gifts or free vacations from automobile manufacturers, in accordance with the company’s long-standing ethical code.

The Editorial department is completely separate from the advertising, sales, and sponsored content divisions of Cars.com.com.

Is Premium Gas Worth It? We Test High Octane on 4 Popular Vehicles

This article appears in the July 2019 edition of Car and Driver. As any good click-generating headline will tell you, the trend that is altering the way Americans walk is far more subtle than most people realize. Electric vehicles will not be seen in large numbers at country music festivals, county fairs, or Tractor Supply parking lots for decades to come, according to industry experts. True mobility will prove to be as elusive as getting tasty vegan bacon in any given location. The tale of smaller engines working harder is one that we are currently living, and it can be found in anything from family crossovers to six-figure autobahn barges.

  1. Because today’s engines are so clever, even non-performance automobiles in the mainstream may reap the benefits of operating on higher-octane premium gasoline.
  2. When it comes to premiums, manufacturers are rarely forthcoming with specifics on the advantages of paying for them.
  3. As of this writing, premium petrol was tracking at $0.59 more per gallon than ordinary unleaded gasoline.
  4. Raising the octane rating (also known as the anti-knock index) of gasoline has no effect on the amount of energy contained in a gallon of petrol.
  5. A lower octane rating indicates greater susceptibility to knock.
  6. Marc Urbano is a chauffeur and a car.
  7. With its turbocharged 1.5-liter inline-four, the Honda CR-V serves as a stand-in for a wide range of cheap crossovers and sedans.
  8. Ford’s F-150 is the best-selling truck in America, and it is equipped with the company’s most powerful engine, a 450-horsepower EcoBoost twin-turbo 3.5-liter V-6.
  9. In addition to acceleration tests and 200-mile fuel-economy loops at 75 mph, we ran dynamometer pulls on each car, driving each vehicle on two different types of fuel and entirely emptying the tanks in the interim.

The disparities would have most certainly been magnified by the severe summer heat, which exacerbates engine knock, yet we were able to detect variances even with the engines inhaling chilly midwestern spring air during our tests.

Honda CR-V

Published in Car and Driver’s July 2019 issue. As any good click-generating title will tell you, the trend that is altering the way Americans move is far more subtle than you might expect. Electric vehicles will not appear in large numbers at country music festivals, county fairs, or Tractor Supply parking lots for decades to come, according to industry experts. True mobility will prove to be as elusive as getting tasty vegan bacon in any given location at any given time. This is the story of smaller engines working harder in anything from family crossovers to six-figure autobahn barges.

  • Many of these downsized engines are actually more powerful than their predecessors, due to technologies such as turbocharging, variable valve timing and lift, direct injection, and the sophisticated computer systems that tie it all together.
  • Vehicles such as the Ford Escape and Mazda 6 are promoted with power statistics derived on 93-octane fuel, while both manufactures are eager to point out that these vehicles will operate just as well on 87-octane fuel.
  • In some cases, ambiguity can be costly.
  • Using the more costly fuel results in a $354 yearly premium for a car averaging 25 miles per gallon and driving 15,000 miles per year.
  • A higher octane level suggests greater resistance to knock, which is the premature combustion of the fuel-air combination that causes the cylinder pressure to rise.
  • Greater-octane fuel flowing through the engine’s injectors allows the engine controller to take advantage of the higher knock threshold and dial in more aggressive timing and higher boost pressures to increase performance.
  • Due to its turbocharged 1.5-liter inline-four, the Honda CR-V can compete with a wide range of cheap crossovers and sedans.
  • Ford’s F-150 is the most popular pickup truck in America, and it is equipped with its most powerful engine, a twin-turbocharged 3.5-liter V-6 that produces 450 horsepower in this application.
  • In addition to acceleration tests and 200-mile fuel-economy loops at 75 mph, we ran dynamometer pulls on each car, driving each vehicle on two different fuels while totally emptying the tanks in between each run.

Even with the engines blowing chilly midwestern spring air, we could detect variations that would have been magnified if the engines had been subjected to high summer heat, which exacerbates engine knock.

BMW M5 Competition

Marc Urbano is a writer and artist who lives in New York City. Chauffeur and automobile Simply thinking about pouring normal unleaded into this $129,595 intercontinental ballistic missile made me feel uncomfortable. BMW officially recommends against doing so, and while it seemed odd in such moderate temps, using the cheap material would have been totally out of character for what an owner would do in that situation (at least until this M5 reaches its fourth owner sometime in 2036). In order to meet BMW’s minimum 91-octane gasoline requirement, with 93-octane fuel suggested, we used a variety of premium gas types, moving between them depending on where you were in the country.

  1. We were interested in finding out.
  2. This is not due to the 13-horsepower differential between 91 and 93 octane.
  3. Because of the amount of power and torque that we measured, our jaws were left dangling.
  4. While BMW claims 617 horsepower at the crank, the dyno reports that the car produces that amount at the wheels (after driveline losses) while running on premium 93-octane gasoline (after driveline losses).
  5. The higher-octane fuel resulted in a single tenth of a second reduction in acceleration times across the board for the M5.
  6. However, the BMW claimed the highest fuel-economy margin in the test, although the difference in mpg was just 0.7 miles per gallon, favoring the lower octane.

Ford F-150

Marc Urbano is a chauffeur and a car. With 128.7 horsepower per liter, the high-output V-6 engine in the F-150 is more power dense than the twin-turbo flat-six engine in the Porsche 911 Carrera. As a result, the Ford is equally adept at hauling asses as it is at hauling a half-ton of dung. Using 93-octane fuel, this self-propelled wheelbarrow can reach 60 mph in 5.3 seconds while towing 5594 pounds of cargo. Marc Urbano is a chauffeur and a car. With the switch from 93 to 87 octane, the power delivered to the wheels reduced from 380 to 360 horsepower.

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Regular gasoline, when compared to premium fuel, drained the F-150’s ability to move quickly both upon leaving the line and through the meat of the tach sweep.

The quarter-mile took 14.0 seconds, but trap speed dropped to 14.5 seconds, with trap speed lowering by 4 mph.

Using high-octane petrol also improved fuel efficiency at 75 mph, increasing it from 17.0 to 17.6 mpg while using a gentle pedal on the accelerator.

This EcoBoost engine’s more aggressive high-octane tuning may be thought of as a type of performance mode that can be activated or deactivated with each fill of its 36.0-gallon fuel tank.

Dodge Charger R/T

Marc Urbano is a chauffeur and a car. As a general rule, we believed that mid-grade fuel was just there to fleece the sort of individuals who ask their vehicle dealer to undercoat it for a few more cents on the dollar. It turns out that this is also true for owners of Fiat Chrysler’s Hemi 5.7-liter V-8, since the firm recommends using 89-octane fuel in this engine as well. However, because there is no mention of this on the fuel-filler door, a motorist would have to consult the handbook to find out.

  • With only 600 miles on the odometer and the appearance of having been hand scrubbed with 80-grit sandpaper a half-dozen times, it’s doubtful that this Charger will ever see 93 octane gasoline again in its lifetime.
  • Well, that’s life.
  • Like the BMW, the Dodge’s increases on the dyno (14 horsepower and 23 lb-ft of torque) translated into minor benefits in our real-world acceleration tests.
  • When traveling at triple-digit speeds, the Charger’s superior power on 93 octane gave it a tenth-of-a-second lead over the competition.
  • In addition, the rumble of the iron-block Hemi and the Charger’s capacity to drop its rear tires to the level of jungle gym ground cover are unaffected by the amount of petrol in the tank.
  • If you purchase fuel with an octane rating that is higher than the manufacturer’s specification, you will most likely notice the difference in your pocketbook rather than the seat of your trousers.
  • Chauffeur and automobile

Knock Knock. Who’s There?

It is possible to assess the octane rating of a fuel by observing how your engine continually invites and silences engine knock. Your vehicle is completely unaware of the octane rating of the fuel in its tank. It is instead calculated by the engine controller using closed-loop logic that constantly advances the ignition timing until it detects knock, which happens when a portion of the fuel-air mixture ignites before the flame front generated by a spark plug reaches the section that has been ignited.

If a knock occurs, the flame front moves across the combustion chamber up to ten times faster than it would normally travel if a spark were to ignite the flame front.

The occasional transient knock, on the other hand, is a vital tool for ensuring that the engine is working efficiently.

Normally, according to Ford’s Stephen Russ, senior technical leader for gas engines, this routine knock is noticed and corrected within one or two combustion cycles and does not represent a threat to the engine’s performance.

—ET This material was generated and maintained by a third party and imported onto this website in order to assist users in providing their email addresses for further consideration. You may be able to discover further information on this and other related items at the website piano.io.

All About Octane – VroomGirls

Regular, mid-grade, premium, 85, 87, 91, 93. are just a few of the options available at gas pumps. It’s easy to become overwhelmed by the options. Which type of fuel should you use in your vehicle? Aaron Gold contributed to this article.

The Short Answer

Unless your vehicle requires E85 or diesel fuel (see below), use the least costly (lowest octane) gasoline recommended by your owner’s manual (save for E85 and diesel fuel).

The Long Answer

The octanerating numbers (87, 89, 91, and so on) relate to the resistance of a gasoline to detonation, which is measured by the octanerating. Your engine makes use of a spark to ignite a mixture of gasoline and air, which is then expected to burn in a controlled manner, according to the manufacturer. Detonation occurs when pockets of fuel detonate before they are meant to due to the heat and compression that occurs during the combustion process (also known asknockingfor the sound that it makes).

Though the vast majority of automobile engines are built to run on ordinary (87 octane) gasoline, certain vehicles employ high-compression engines, which compress the air-fuel combination to a smaller size before sparking it to life using a spark plug.

Premium fuel: Required VS. Recommended

The minimum permissible octane for your vehicle is specified in your owner’s handbook, and this information may also be printed on the gas cap or the gasoline filler door. If your vehicle requires fuel that is higher in octane than 87, make a note of whether it is suggested or needed. Recommendedmeans that premium gasoline will provide higher performance (and in many cases, better gas mileage), but that the automobile will operate just fine on lower octane fuel. You should always purchase the higher octane fuel if it is specified as necessary to avoid engine harm.

Gas stations in the United States employ the AKI and (R+M/2) measures.

What Happens If I Use Regular In A Car That Requires Premium?

Prior to the introduction of premium fuel, it was possible to inflict engine harm by using 87 octane gasoline in a vehicle that needed premium fuel. Today’s automobiles are equipped with knock sensors that can detect detonation and adjust the engine’s calibration to compensate, however the engine may produce less power and may have poorer gas mileage as a result. If your vehicle needs premium fuel, using gasoline with a low octane level may result in damage to the vehicle and may violate the manufacturer’s warranty.

What Happens If I Use Premium In A Car That Requires Regular?

There’s nothing you can do but spend more money. It’s a common misconception that high-octane petrol would boost performance; however, this is not true. Octane relates to the detonation resistance of the fuel, not the amount of power it carries.

However, while some oil firms claim that their high-octane fuel is more effective at keeping engines clean, the fact is that the Environmental Protection Agency requires cleaning chemicals to be included in all gasoline grades.

What About Mid-Grade?

Some stations provide mid-grade gasoline (usually 89 octane). There are a few cars that require 89 octane petrol, but the vast majority of automobiles are intended to run on normal or premium gas. In situations when your automobile recommends (but does not require) premium fuel, mid-grade will provide you with some of the performance advantages, but you will still experience lower power and fuel economy. If your vehicle requires frequent maintenance, using mid-grade oil will not increase its performance.

What If The right Octane Isn’t Available?

In certain high-altitude places, 86 or even 85 octane gasoline is available for purchase as “normal” grade gasoline. At higher elevations, the thinner air compensates for the lower octane of the fuel, allowing the engine to run without detonation for the majority of the time. If you plan to stay in the area, you can generally use the same type of gasoline that you would use at lower altitudes, such as regular, mid-grade, or premium, if you want to save money. If you want to go outside of the high-altitude zone, stick to the numbers and use the same octane as you would at lower elevations to save money.

What About E85 And Diesel?

If you live in a high-altitude location, you may find gasoline with an octane rating of 86 or even 85, which is classified as “regular.” At higher elevations, the thinner air compensates for the lower octane rating of the fuel, allowing the engine to run without detonation for the majority of the time. In general, if you are staying in the region, you may use the same type of fuel that you would use at lower elevations, such as normal, mid-grade, or premium gasoline. If you’re heading out of the high-altitude zone, stick to the numbers and use the same octane as you would at lower elevations to conserve fuel.

Can I run my 93 octane tune on 87 octane fuel?

What is the number of times we have heard this question asked? Even if the emphatic answer to that question is “NO,” have you ever paused to consider why the answer is no? What exactly is octane, and why might I adjust for higher power levels as a result of using it? What will happen if I use a lower octane fuel than the one that was specified for my vehicle?

What is octane?

For the uninitiated, octane is a measurement used to determine how much compression a gasoline can tolerate without pre-ignitioning. The four-stroke cycle of a single piston in a gas internal combustion engine is seen in the animation above. At the start of the first cycle, the right tube (also known as the intake valve) opens up and the piston goes downward at the same time. As a result, the cylinder is filled with a combination of air and fuel (shown by the color blue). As part of the second cycle, the piston rises, compressing the air and fuel in the cylinder and raising the temperature and pressure inside the engine compartment.

It is during this cycle that the energy required to run the automobile is generated.

Thereafter comes the fourth cycle, in which the piston rises and forces what is left of the combusted air/fuel (known as exhaust and represented by brown) out of the left tube, which is also known as the exhaust port. Then it’s back to the beginning of the cycle.

So what does this have to do with octane?

Everything, to be honest. Similarly to what was said before, the higher the octane rating, the better the ability of the gasoline to sustain higher pressures without pre-ignition. A wide range of alternatives are available to boost power and efficiency as a result of this. It is possible to improve the performance of your vehicle by adjusting the compression ratio, raising boost pressure, modifying the timing of spark ignition, injecting less gasoline into the cylinder, and other modifications.

  • We may now return to those three numbers — 87, 89, and 93 — with this newfound knowledge in hand.
  • To put it another way, gasoline with an octane rating of 87 or above is capable of withstanding the compression ratios used in most automobiles.
  • Moreover, since 87 is the usual octane rating for the gasoline that the majority of engines now utilize, the only difference between 89 and 93-octane rated fuels is their ability to withstand higher temperatures and pressure before spontaneously igniting.
  • Higher octane fuels will not harm engines that are built to run on 87 octane gasoline, but they will not give much of a benefit in most cases, as well.
  • More compression equals a greater boom.
  • Thus, the likelihood of blowing up your engine due to pre-ignition occurrences for which the tune is unable to counteract increases significantly.


Automakers are promoting a variety of technologies to enhance fuel efficiency in their vehicle fleets, including electric powertrains, lightweight materials, and better gearboxes.

However, the sector has not yet taken advantage of higher-octane fuels, which might prove to be a significant factor in increasing efficiency in the near future. In the background, automakers and oil corporations are developing higher-octane fuels and engines. LikeLikeLoveHahaWowSadAngry3

About the author:Bob

As a retired Army officer with a career as a CH-47 helicopter flight engineer, I have 21 years of service. I’ve been a Genesis Coupe fan for the last five years, and I’m presently a Moderator and Contributor for the GenCoupe.com Forums, as well as the author of “The Ultimate Genesis Coupe Newbie Guide to Modding” and the “Ask a Geek” sub-forum. In addition, I serve as an administrator and event coordinator for GenSport United, as well as numerous other Facebook groups, among other things. While I do not claim to be an expert on the Genesis Coupe, I have made a significant effort to learn as much as I can about it and to share what I have learned with anybody who is interested in hearing about it.

Select the right octane fuel for your vehicle!

The octane rating of a gasoline is a measure of the fuel’s capacity to withstand “knocking” or “pinging” during combustion, which is produced by the air/fuel combination detonating prematurely in the combustion chamber. Unleaded gasoline in the United States normally has octane ratings of 87 (regular), 88–90 (midgrade), and 91–94 (high grade) (premium). In some high-elevation locations of the United States, gasoline with an octane rating of 85 can be found on the shelves (more about thatbelow).

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What octane fuel should I use in my vehicle?

It is recommended that you utilize the octane rating specified by the manufacturer for your vehicle. As a result, see your owner’s handbook. The majority of gasoline cars are built to operate on 87 octane fuel, however some are designed to run on higher octane gasoline.

Why do some manufacturers require or recommend the use of higher octane gasoline?

Higher octane fuels are frequently required or recommended for engines that operate at a higher compression ratio and/or that employ supercharging or turbocharging to drive more air into the combustion chamber. The ability to extract more mechanical energy from a given air/fuel combination is enhanced by increasing the pressure in the cylinder; however, higher octane fuel is required to prevent the mixture from pre-detonating. High-octane gasoline will increase both the performance and the fuel efficiency of these engines.

What if I use a lower octane fuel than required for my vehicle?

Using fuel with a lower octane rating than necessary might cause the engine to perform badly and can eventually cause harm to the engine and emissions control system. It may also result in the voiding of your warranty. An audible “knocking” or “pinging” sound can be heard coming from the engine of older automobiles. The spark timing of many contemporary automobiles may be adjusted to eliminate knock, but engine power and fuel economy will still suffer as a result.

Will using a higher octane fuel than required improve fuel economy or performance?

It is dependent on the situation. When used in heavy duty operations such as pulling a trailer or hauling large loads, higher octane fuel can enhance performance and gas efficiency while also reducing carbon dioxide (CO 2) emissions by a few percent. This is especially true in hot weather. However, under regular driving circumstances, you may see little to no improvement.

Why does higher octane fuel cost more?

In general, the components of fuel that increase octane are more expensive to manufacture.

Is higher octane fuel worth the extra cost?

Yes, if your car demands midgrade or premium fuel, there is no doubt about that. If your owner’s handbook states that your vehicle does not require premium gasoline but that higher octane fuel would make your car operate better, the decision is ultimately up to you. In most cases, the cost rise outweighs the benefits from reduced gasoline use. Reduced CO2 emissions and reduced petroleum use, even if only by a tiny percentage, may be more significant to certain customers than the expense of doing so.

What is 85 octane, and is it safe to use in my vehicle?

Without a doubt, whether your vehicle demands midgrade or premium fuel. Your choice is ultimately determined by your owner’s handbook. If your vehicle does not require premium fuel but does run better on higher octane fuel, the choice is yours. In most cases, the cost rise outweighs the savings in gasoline. Reduced CO2 emissions and reduced petroleum use, even if only by a tiny percentage, may be more significant to certain customers than cost savings.

Can ethanol boost gasoline’s octane rating?

Yes. The octane rating of ethanol is significantly greater (about 109) than that of gasoline. Refiners typically combine ethanol with gasoline to assist raise the octane rating of the fuel; most gasoline sold in the United States includes up to 10% ethanol. In certain regions, ethanol blends with up to 15 percent ethanol are available, and numerous automobile manufacturers have approved the use of this mix in recent-model automobiles. Take a look at the data sources. Page 120 of the Ford Fiesta Owner’s Manual, published by Ford Motor Company in 2013.

  • Szybist and B.
  • 6, no.
  • 44-54, 2013, doi:10.4271/2013-01-0888.
  • Stein and colleagues (2012) examined the effect of heat of vaporization, chemical octane, and sensitivities on the knock limit for ethanol-gasoline blends, and the results were published in the Journal of the American Chemical Society.
  • 5, no.
  • 823-843, doi:10.4271/2012-01-1277.
  • Leone, E.

Anderson, H.

SAE International Journal of Fuels and Lubricants, vol.

1, pp.


The Society of Automotive Engineers is based in Warrendale, Pennsylvania.


McGraw-Hill Education, New York.

Gibbs, B.

Barnes, and colleagues 2009.

Chevron Corporation is a multinational oil corporation.


Oak Ridge National Laboratory.

The Octane Response of Vehicles that are Recommended for Premium.


Cracknell, V.

Doyle, and more authors 2016.

SAE Int.

Fuels Lubr.9(2):345-357, doi:10.4271/2016-01-0834.



Huff, L.

DeBusk, and S.

The effects of high-octane E25 on two vehicles equipped with turbocharged, direct-injection engines were investigated in this study.

Oak Ridge National Laboratory.

The Oak Ridge National Laboratory administers this website on behalf of the United States Department of Energy and the United States Environmental Protection Agency.

The Oak Ridge National Laboratory administers this website on behalf of the United States Department of Energy and the United States Environmental Protection Agency.

How to Fix a Gas Octane Mixup

Mr. Fix-It-Up-For-The-Family Gas octane is important for particular types of vehicles, and putting low octane into a vehicle that requires high octane might result in difficulties with the vehicle. Here’s how to get them to work again.

Boosting octane level

Accidentally pouring 87 octane gasoline into a vehicle that requires 93 octane fuel may result in the ‘Check Engine’ light illuminated on the dashboard. Vehicle computers can adjust for lower-than-optimal octane by shortening the time between ignition and combustion. The computer’s capacity to adjust, however, can be rapidly outstripped if you use 87 octane when the owner’s handbook suggests using 93. So the next time you fill up your tank, make sure you use the proper octane petrol. Purchase an octane booster at your local car parts store in the meanwhile to ensure that the check engine light does not illuminate while driving.

If the octane level in your gas is the source of your check engine light, the booster will resolve the issue after around 20 miles of driving.

Required Materials for this Project

Preparing all of your stuff ahead of time can save you time and money on last-minute buying visits. Here’s a list of things to do.

Premium vs. Regular Gas Explained – TrueCar Blog

Preparing all of your stuff ahead of time can save you time and money on last-minute purchases. Listed below is a summary.

So, what’s the difference between premium and regular gas?

By preparing all of your materials ahead of time, you may avoid last-minute buying visits. Here’s a list of some of them.

If your car doesn’t require premium, fill up with regular.

Why would you spend good money on something you don’t require? Premium fuel costs around fifty cents more per gallon than ordinary gasoline and has neither good or negative impact on cars that are unable to take advantage of the premium price. The Federal Trade Commission states in a consumer advisory that “in the vast majority of circumstances, using a higher-octane gasoline than your owner’s handbook suggests provides absolutely no advantage.” It will not improve the performance of your automobile, make it drive quicker, increase its mileage, or make it run cleaner.” Since a result, the detergent additives in your gasoline are significantly more essential than the octane rating, as they aid in cleaning your engine and optimizing its performance and efficiency.

In addition, each shop offers a unique combination of chemicals that are utilized throughout all grades.

When it comes to additives, some companies have greater expectations of themselves.

Reduced amounts of the detergent ingredient, according to the researchers, can cause additional deposits to form on engine components such as fuel injectors and intake valves. This, in turn, has the potential to reduce engine performance while simultaneously increasing emissions. j

If your car requires premium, fill up with premium.

To attain the desired level of performance, fuel efficiency, and emissions from an engine with a high compression ratio, higher octane gasoline is often required. If your vehicle need premium petrol, don’t cut corners. While you may save money on petrol, your car’s performance and fuel efficiency may suffer as a result. This can make a significant impact in automobiles that are equipped with turbocharged engines. What happens if you need premium petrol for your automobile but it isn’t available?

Because the engine’s computer has the ability to modify the ignition timing, your car will most likely be alright running on normal once in a while, but we don’t recommend putting it through its paces on a regular basis.

You should expect your horsepower and MPG to decrease, but your CO2 emissions will likely increase.

If your car only recommends premium, the choice is yours.

Premium gas is recommended, but not required, for specific automobiles such as the Ford F-150 and Mazda MX-5 Miata, according to the manufactures. According to AAA’s findings, these cars experienced a small improvement in performance and fuel efficiency while running on premium petrol. Luxury or high-performance vehicles benefit from premium petrol since it helps to bring out the most in your vehicle’s performance and aesthetics. However, if your owner’s handbook specifies that “premium fuel is advised,” you can safely use normal gasoline.

It all boils down to personal choice at the end of the day.

What happens when you put regular gas in a premium car?

In the event that you own or have driven a vehicle that requires premium petrol, you may be curious as to what would happen if you filled the vehicle with standard gas. It’s possible that you don’t even operate a car that uses premium petrol, but you’re just interested in learning more about it. Many individuals ask whether or not they will save money by using ordinary gas, or whether or not using regular gas would have an impact on their gas mileage, either favorably or adversely. Alternatively, it’s possible that you’ve arrived onto this blog page because you unintentionally put normal gas in your luxury vehicle.

There are many different reasons why people ask the question, but the most important thing is what the response is. Stay tuned because we’ll explain what happens when you put normal petrol in a high-performance vehicle.

What won’t happen

If you find yourself in the unfortunate scenario of mistakenly putting the wrong type of gas in your automobile (regular gas into a premium gas vehicle), you don’t need to be too concerned about how it will effect the physical condition of your vehicle. Even if you make this error once or twice, it is unlikely that your automobile will be damaged, and you should be completely OK in the long term. Furthermore, it is unlikely that your automobile will see any substantial changes in gas mileage or other characteristics as a result of that one event.


There have been a few instances when normal gas has been used in a premium tank, and as a result, we urge that you do not put regular gas in your automobile if it requests premium. First and foremost, you should examine the owner’s handbook for your vehicle. Turn to the appropriate section on fuelling your engine and continue reading to find out whether premium gasoline is a must-have for your specific make and model of vehicle. Over time, consuming ordinary fuel in excess of the requirements of your vehicle might cause harm to your vehicle.

The next time you hear or feel this ‘knocking’ in your engine, you should take your vehicle to a nearbyMcKinney auto shop to check sure everything is still operating properly.


So, once again, we recommend that you just follow the instructions in the handbook.

The ‘science’ behind it

Premium gas has a higher octane rating than normal gas; in other words, it has a stronger resistance to explosion than regular gas. Because of the numerous pressures that are building up inside the engine’s cylinder, the temperature is rising as well, and the gasoline may detonate, or “explode,” in the cylinder at times. The denotation is, in essence, the evil guy. The engine in your automobile will suffer as a result of this, and it isn’t something you want to be occurring in there. The denotation, or explosion, is what produces the previously described ‘knocking’ of the engine that can occur when lower octane gas is used in a high-end car with high-performance tires.

We, at Nortex LubeTune, are able to provide you with that assurance.

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