Discussion board confirming that ethanol, while reducing emissions, also reduces mileage...

Quoted: We have had 5-10% ethanol in many stations around the country, especially in the winter. It can help reduce some emissions. It also reduces mileage as ethanol has less energy per gallon than gasoline. When the 85% stuff comes out you can expect an even larger hit on mileage. On most cars there is also a hit on performance, but it is slight and usually not noticed. The 85% stuff may make a larger hit, but then again it may not as the cars designed for it may be able to avoid that part, but they can't avoid the reduced mileage.

I've notice lower mileage when I use Arco gas. I believe they add ethanol...

Quoted: The most current information derived from controlled environmental testing is that on fuel injected vehicles, fuel mileage may decrease by approximately 2%. A vehicle that averages 30 MPG on the highway would average 29.4 MPG using ethanol-blended fuel, a small price to pay for a cleaner environment.