Is There A Big Difference Between 91 And 93 Octane?

Should I tune for 93 octane?

On a 93 tune, use 93 or better.

It won’t hurt anything to run better octane fuel with a lower octane tune i.e.

93 gas with 91 tune..

Can you run 93 octane on a 91 octane tune?

Never use a octane lower than what’s prescribed by the tune. … You may use a higher octane than prescribed by the tune. For example, running 93 Octane (R+M)/2 on a 91 Octane (R+M)/2 program is fine, and in some cases may offer a bump in performance.

Does premium gas last longer?

Sadly, there’s nothing in premium gasoline that would make it last longer than other fuels from the pump. Since the distinguishing feature is the higher-octane levels, the only real benefit you gain is lowering the chance of engine knocking, which isn’t much of a threat on most modern fuel systems.

Is premium gas really worth it?

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.”

What happens if you mix 91 and 93 gas?

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.

How much HP does a 91 octane tune add?

Premium Member Seldoon said: There is no difference in HP between 91 and 93 octane UNLESS you have had your car tuned for 91 octane but can NOW get 93 octane. Well just putting in the 93 octane won’t give you any more HP. You need to get the car retuned for the higher octane gas.

Does premium gas give better mileage?

Premium gives better gas mileage Because premium gas has a higher octane rating than midgrade or regular gas, it produces a little more power when burnt. Designed for performance cars with large, powerful engines, premium also helps minimize the risk of preignition inside highly-stressed, hot engine cylinders.

Does high octane fuel clean your engine?

doesn’t higher octane fuel clean my engine better? High octane gasoline doesn’t outperform regular octane in preventing engine deposits from forming, in removing them, or in cleaning your engine.

Can I put 89 gas in my BMW?

BMW states that the minimum AKI Rating is 89 in their manual so the engine should be fine with that fuel. This is what BMW’s manual states: Quote: The minimum AKI Rating is 89 .

Can I mix regular and premium gas?

Can I mix premium and unleaded gas? 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.

Does higher octane gas really make a difference?

Raising the octane rating (also known as the anti-knock index) doesn’t change the energy content of a gallon of gasoline. A higher octane rating indicates greater resistance to knock, the early combustion of the fuel-air mixture that causes cylinder pressure to spike.

Why do some states not have 93 octane?

Why do some states (like Colorado) sell 91 octane gasoline as premium instead of offering 93 octane (like Florida)? … This is because a long time ago, studies were done that showed that at lower air pressures (i.e. higher altitudes) that engines performed the same at 85 octane as they did at 87.

What gas is better 91 or 93?

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.

Can high octane fuel damage an engine?

The higher octane gives premium gas greater resistance to early fuel ignition, which can result in potential damage, sometimes accompanied by audible engine knocking or pinging. … If you use premium fuel because your engine knocks on regular, you are treating the symptom, not the cause.

How much horsepower does a 93 octane tune add?

When switching from a 91 octane tune to a 93 octane tune you can expect to see an increase of 5 to 6 more horsepower on top of the gains you are already getting from an 87 octane Bama tune.

Can you run 87 octane on a 93 octane tune?

87 is the standard octane rating that most car engines are designed for. … The reason why you should never run a lower octane fuel on a vehicle tuned for higher octane fuel is because the tune has no way of detecting what fuel you are using and will continue to operate assuming you put in the correct fuel.

Why is topping off bad?

Gas vapors are harmful to people, the environment Huddleston says topping off can cause gas to spill onto the ground, causing harmful effects to the environment and people’s health. If you damage your car’s vapor recovery system, it won’t be able to effectively do its job of protecting people from harmful vapors.

Is it OK to mix 89 and 93 gas?

No, you will not damage your engine by mixing different octane fuel. It is still fuel. Say you mixed 2 gallons of 87 octane with 2 gallons of 89 octane and 2 gallons of 93 octane.

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