I think I saw a bump in my mpg around 10k.
Wrong again, keep trying though.All gas has (ethanol) in it. And your mpg. drops also,
Driving up to baraboo Saturday to pick up an outboard! I won't have the subie though. Look for a ugly-arse green F150.Negative...I can buy premium (91 Octane) fuel at three different stations here, that does not have ethanol. Wisconsin has not mandated that premium be mixed yet, although some companies are doing it.
Trust me, my previous car required premium gas, and I found the best mileage (18 highway) was with 91 octane, non ethanol fuel.
In fact, another Touareg owner ran his on 87 octane for half of a 3000 mile trip, and on premium for the return. At the end, with the decreased mileage from the 87 octane, his numbers came out to .02 difference between the cost of the two. Now, I understand that engine was designed for premium fuel, thus why it was required, but if I could find 87 octane without ethanol, I would be all over it.
I don't use Premium for it's octane rating around here, I use it because it is ethanol free. That isn't backwards, it's fact.You guys are getting it backwards. Ethanol is actually one of the things used to increase the octane rating of the base fuel. The higher the octane rating the more stable the fuel is ie harder it is to burn. Why do cars need higher octane fuel? Engines which create more unstable conditions in the combustion chamber need more stable fuel to avoid pre ignition.
Strait ethanol has a octane rating of 100 by the way. This has nothing to do with stored energy per volume of fuel which impacts your mileage the more stored energy fuel contains the less volume of fuel you burn. Octane is simply a rating used to measure how stable the fuel is.