Which Octane Do You Use?

31814 Views 47 Replies 20 Participants Last post by E_Net_Rider, Dec 27, 2009

Duckybill

Discussion Starter · Nov 29, 2009

I have a 4 cyl, A6 2010 LTZ with less than 5000 miles on it. I just pumped some Shell 89 octane in it today. Thought I'd give it a try to see if I can tell any difference in MPG or performance. What do you folks like?

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redhorse

· #12 · Dec 2, 2009

Around here, higher octane gas has less ethanol, thus giving better gas mileage.

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redhorse

· #22 · Dec 4, 2009

Recent testing has shown that, on the average, cars get about 1.5% to 3% lower mileage with E10 than with regular unleaded. That's about 1mpg if you are getting 30+ in the worst case.