Anybody using ethanol free gas in your B7? I just put in almost a full tank full, there was probably 4 gallons left of the 10% ethanol gas. I'm experimenting to see if there will be a difference in mileage or power. Maybe you've already found out?

 

yea i only use 91 ethanol free premium and my mileage is better than with a 10% mix. my best highway avg is 30-33mpg and 25-28 city. 27-29 mixed.
definitely worth it, i go to Fastrac because they are the only place to offer it and then have a membership discount