Well big bill I'm not sure what "reason" was missed. Your reason seems to fall under the heading of "WMD". The fault with your reason is that by the time the government goes through the process opec won't have any oil to sell. So why not build an engine to run E85, pay less than the 20%, and gain a little extra performance indefinitely. My 2 cents.

Larry

Ignorance can be fixed Stupidity is forever