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not at all you're essentially making 89 octane.

Using a higher octane than the engine was designed to burn is a total waste of money. It will provide no benefit whatsoever. No better mileage and no more power. It is a myth that is does. In fact on modern cars it may make it harder to start. Use what is recommended by the manufacture.

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Q: Will mixing 87 octane gas with 91 octane gas affect your car?
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Will mixing 91-octane gas and 87-octane gas damage your car?

Not really. Fill up with the "correct" octane when you run some fuel out of your ride.


How does octane percent affect a car?

octane is how volatile the gas is the higher the octane the bigger the boom and cleaner it burns


Do you get better gas mileage by car if you use higher octane gas?

Yes, higher octane gas does give higher gas mileage for your car. However, the increase in gas mileage may not as great as the increase in the price of the higher octane gas.


What octane gas?

Each car should have a recommended fuel octane in the owners manual.


Does medium gas octane affect a car which uses premium fuel?

Using a fuel other than specified could adversely affect the emission control system, and may affect warranty coverage.


What is the best octane or gas for my car Mitsubishi galant 1994 VR4?

93 octane all the way!


Can you use 91 octane gas on a 93 octane gas car?

New cars with knock sensors to adjust ignition timing can run on lower-octane fuel, but you lose power.


Mixing unleaded and super unleaded gas is it good?

There is no risk in mixing super unleaded gas and regular unleaded gas. Super is just given to the name of a gasoline because of cleaning agents and octane added to the gas not because the gas is completely different.


What octane gas does a 2002 Volkswagen beetle turbo take?

A 2002 Volkswagen Beetle Turbo takes 91 octane gas or higher. The manufacturer's recommended octane for this car will also be listed on the inside of the gas cap.


Does high octane gas increase mileage?

Not unless the engine using it was specifically designed for it. Gas mileage takes many things into consideration, and if a car is designed to use standard octane gas, the use of high octane gas will not increase the car's mileage - it is just a way of figuratively blowing dollar bills out of the tailpipe.


Does higher octane gasoline give you better gas mileage?

No. If your car runs well on a lower octane gasoline (i.e. no engine pinging or knocking), then putting a higher octane gas in your tank is just wasting money...


Will 93 gasoline affect the engine?

To anyone who does not know what this means who is reading this, '93 gasoline' describes the level of octane (as measured by a special chemical equation) in a gallon of gas. 93 level octane (as it is called) will have no affect on the average engine, and it is only a myth that it will improve performance or mpg in a car. So the answer is no, it will only affect your wallet (cost of 93 versus a cheaper fuel) unless you happen to own a car with a high compression engine it is a waste of money to buy a higher octane than your car was designed to use. In fact newer vehicles with computer controlled fuel management systems requiring 87 octane will be harder to start with a high octane fuel.