It certainly is legal to set up a still and run off your own alcohol for fuel purposes. You need to get a permit from ATF to do so. The link below has a link to the ATF form.

If you are interested in making alcohol to supplement (or even replace) the gasoline in your vehicle, here's a great place to start: Make Your Own Fuel

Jeff Nelson

"Beer is proof that God loves us and wants us to be happy." - Benjamin Franklin
"Always do right. This will gratify some people and astonish the rest." - Mark Twain