Will Acetone in the tank up your fuel efficiency?

That seems to be the question of the hour.  I’ve some swear they get up to 5% better fuel efficiency by adding acetone in the tank, others have said it doesn’t work.  So what is the real story?

I don’t have a clue… Personally, I haven’t seen much of an increase at all but I’m wondering if that has more to do with my lead foot.

Here with a not so scientific experiment on the issue is the always fun Landon Gendur.