Join Date: Jan 2006
Car Year: 2004
Car Model: 2.5 XT
Feedback Score: 8 reviews
The ethanol allows more timing advance, but less actual energy is released by burning it. It can be great in a turbo vehicle if tuned, but otherwise it just generally gives you worse mileage. If its less than 10% ethanol however it won't make much of a difference (almost all "petrol" in NY is 10%ethanol now, impossible to find it without as everyone loves to grow corn here).
04xt/4eat, 16g, STI bits and bobs