if you take the politics out, Ethanol has a bunch of pros/cons and is not simply "evil". I haven't noticed any real issues running E10 in any of my cars. E85 in a properly tuned turbo car can make a ton more power over 93.

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2006 Audi A3 2.0t DSG apr stage 2
2002 BMW X5 4.4
1997 BMW 328ic sport. moreagrun metallic
1989 BMW 325is with / M50b25nv swap