From the Corvette Forum, here's a thread that might answer some related gas vs. ethanol questions.
Post #22 on the 2nd page is the most informative.
http://forums.corvetteforum.com/c4-t...asoline-2.html
(FWIW, I also noticed recently that E15 has been approved. Said you can only use it in 2001 and greater automobiles because the fuel systems were mandated by then. This doesn't jive with the 1993 comment.)
