Join Date: Sep 2011
Thanked 258 Times in 197 Posts
I'm starting to see more stations offering ethanol-free in my area (WI).
Some of the stations (BP, Mobil, Amoco) have Premium in ethanol-free, while others of the same brand don't - so they must be able to choose. That means you need to look carefully at the pump. In this area, ethanol-free is about 10% more expensive than E10. As Stichill noted, you do get some mileage benefit from ethanol free over E10, but it doesn't fully equal out.
Some, not all, of the Cenex station offer ethanol-free in all grades.
The biggest benefit of ethanol-free comes when you have a steel gas tank. Ethanol contains and holds water, in addition to going bad quicker, so keeping your steel tank topped-off with ethanol-free gas will help reduce the chances of rust forming.
For older cycles, ethanol will attack seals and gaskets not made of newer materials that are ethanol safe.
For engines with carburetors, ethanol will lean the mixture, possibly making the engine run hotter. Newer small engines are tuned for E10, but when it first was introduced E10 was credited with damaging small engines like trimmers, edgers, snowblowers, etc., by leaning them out more than they already were.