Granted, Jalopnik advising on fuel chemistry is like Lindsay Lohan interpreting the Dead Sea Scrolls. But we've been hearing about this acetone fuel-additive trick for years now, and we've just been hipped to the supposed video test proving its worth. Apparently, acetone aids in the vaporization of fuel, which increases thermal efficiency. In that way, it makes gasoline act more like propane or natural gas, which is often said to be the most efficient of the fossil fuels for internal combustion. We're not advocating running out and trying this without serious considerations, especially since an acetone spill will make your paint look like Shrinky Dinks, and you could blow yourself up if you're smoking or near an open flame. Any takers? [Thanks to Nelson for the tip.]

Gas Saving Tips for Flummoxed Drivers [internal]