Question about 2001 Buick Century

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Was told to use premium 89 octane gas only this true?

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Yes. 91 , 93 , 94 octane fuel is for hi compression ,turbo , supercharged engines . higher octane grades of fuel will not pre detonate under the extra heat of high performance engines. You are better off running (87 , 89 octane gas) in your car .

Posted on Jan 03, 2011

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This is true. The only time you need to apply gasoline with higher octane is when preignition is present. If it sounds like marbles are bouncing in your engine when you are driving then get higher octane. However if the car is in good mechanical condition (cooling system, oil serviced regularly) then 89 octane is perfect.

Posted on Jan 03, 2011


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I just purchased a 2006 VW Passat 2.0T. When I opened the lid on the gas tank area, there is a sticker indicating that they prefer I use "unleaded premium, 91 octane". Can I use ethanol 89...

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I am simply trying to find out the octane rating I need for my 1999 Mazda Miata. I just purchased it and have no owners manual.

Thanks for using FixYa and welcome to the site. You can use 89, but you are better off using 92.

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What type of gas is best for a 1985 corvette cause im not sure if the middle one is ok or if i should go with the premium

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Regular unleaded or Premium ?

This is a wide range of fuel types. Minimum Octane level to run decent is normally 87. Up in the northern areas and hilly states I've seen this a little lower. Typically your choices are 87 octane, 89 octane and 93 octane. I recommend using the 89 octane or mid grade to get the best mileage and consistent performance from the vehicle. You will get better mileage from the higher 93 octane or Premium but this is off set by the increased soot and build up over time and the mileage isn't that much better to justify the cost between the Mid and Premium grade fuels.

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What grade gas should be used ?

You should always use premium fuel on the high conmpression V8 engine. Cheaper fuel can cause a PING, and possible engine damage. 87 octane is definitely not recommended at any time, but sometimes you can get by with 89 for a small period of time.

Gas mileage and power will both be down with lower octane fuel, so do not use it all the time.

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What grade is gas is good for 1999 toyota camry

Hello, and welcome to FixYa.
Please allow me to assist you with your question.

The 1999 Camry can run on any grade of octane, 87, 89, 91, 93 or 94. However, it will run best on 89 octane. That is what I use in my Camry, and it is also recommended to our service customers in our shop. You can safely use 91, 93 or 94, but those higher grades really will get you no better results; as the engine is not designed for that octane. It will run normally, on the higher octanes, but keep in mind that it will not run any 'better'.
You may have heard in the past that people 'treat' their car to a tank of 'premium'. That really serves no good purpose. All that does is costs you more money for a tankful, so adding premium at random intervals is not recommended.

I hope that this answers your question.
Thanks for choosing FixYa for assistance.

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What type of gas does the mazda protege se take

regular 87 octane unleaded is sufficient for this car. putting premium in is a waste of money and can actually hurt performance. the only exception to this can be if you life in an extremely low altitude area (below sea level), in which case you sometimes need a higher octane to compensate for air density.

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Is it harmful to a car to switch between uleaded and premium gas in a car? I have a 2009 Honda CRV and it says in the manuel that I can use anything 87 octane or higher. I have probably switched about 3...

Premium gas is still unleaded. Using a higher grade gas (ie: 89 or 91 octane) isn't going to hurt anything, and it isn't going to help anything either. You should stick to regular 87 as the higher octane rating gas isn't giving you any advantages.

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1984 Chrysler LaBaron fuel recommendation

Premium. Gas is rated by octane lnumbers and those numbers have stayed the same over the years. Mid gas would not have a high enough octane rating for your engine.

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Ideal gasoline

87 octane is ideal for your accent.

It's a little commuter car. It's designed to save you money.
Anything over 87 is just a waste of money, UNLESS your engine is knocking at 87. Then you should step up to the next highest grade.
89 is a made up octane. It's just a mix of the lowest grade and the highest grade. I used to work at a mobil gas station for a year, and the only grades i knew wer 87 and 93, but 89 was an available option. it's just a way for oil companies to benefit off of ignorance.
91 and 93 is for high performance engines, turbo-induction, superchargers, that sort of stuff.
you should be fine sticking with the 87 though, but move up to "89 octane" or 91/93 if your engine knocks a lot.
hope this helps.

Feb 13, 2009 | Hyundai Motor 1998 Accent

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