RandomTask, I know they tell you that newer rubbers are ok with e10, my sources tell me that studies conducting over long periods of time find that they aren't. They're much more resilient than the old rubber, but still won't last as long were we to use MTBE or just unoxygenated. Bump it up to 85% and now they don't last nearly as wrong as with pure gas. This is what the people who work for the companies have told me.

The livestock feed is a false benefit, as using food for fuel has greatly increased the cost of livestock feed.