Audi "recommends" using 91 octane gas but "requires" using no less than 87 octane. Will using 87 octane on a regular basis harm my vehicle?

115

Asked by May 24, 2013 at 09:24 AM about the 2013 Audi S4 3.0T Quattro Premium Plus

Question type: General

Audi "recommends" using 91 octane gas but "requires" using no less than 87 octane. Will using 87 octane on a regular basis harm my vehicle? From what I understand, today's hi-tech cars are designed to compensate or automatically adjust to lower octane unleaded gas so as to avoid "knocking" or "pinging". Is it just a waste of money to pay for "premium" octane gas?

4 Answers

645

What year is your Audi? - Audi recommends the higher octane for two reasons: It is refined cleaner, which means it does not gum up the lines, and burns cleaner in the engine allowing longer periods between oil changes, and the second is performance. Higher Octane means more energy in each combustion cycle. You may not notice a difference, but the engine will run more effeciently on a higher octane. Plus, when you break it down, if you put 10 gallons a fuel in, you're paying just a $1.00 more per fill up. This trouble is much better than dealing with a clogged fuel pump. I say suck it up and eat the $1.00 per fill-up and enjoy the greatness that is Audi.

9 out of 9 people think this is helpful.
105,895

The specs on some cars says premium (suggested). Looking at the specs on yours it states premium (required). I would only use the premium in your car. After looking at the specs on your car I just might have to go take one for a ride. 3 L V6 Supercharger AWD. Bet that's fun to drive.

4 out of 4 people think this is helpful.
86,615

Believe it or not but there are still some places that do not have premium fuel at the pump, it is that reason they put the "no less than 87" there as it is the bare minimum you can run. It is designed to use the expensive stuff so don't scrimp on the fuel you will pay for it in the long run. I would keep a bottle of 104 octane booster in the trunk just in case you do get a bad batch of fuel.

1 out of 1 people think this is helpful.
93,625

Buy the premium fuel. It delivers better performance and fuel economy for a few cents more per gallon. The S4 is a beautiful car with a high tech engine. Treat it right. --- See what other owners are saying on Audiworld.com and Audizine.com

3 out of 3 people think this is helpful.

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