I know there have been discussions about using a gas stabilizer in stored containers, but what about using it right in your vehicle gas tank?

A friend of mine doesn't drive much, and a tank of gas lasts her a long time. Would it be advantageous for her to add one of those stabilizers to her tank? She just filled it up for the winter at today's $2/gal, and it will probably (literally) last her all winter.

If this stuff is suitable, are there any recommended types or brands? Is there something better?

Thanks!

Sue