Should a gasoline tax be levied to subsidize/jump start the ethanol industry?

[KEmperor]

i prefer a gas guzzler tax.

a tax of 3% on the sale of a new, non-commercial vehicle that gets below 22 mpg.

every 2 years the mpg threshold should be raised by 1, to keep manufacturers on their toes.

Something like this already exists:

http://en.wikipedia.org/wiki/Energy_Tax_Act