There were a couple of things in the article which I don't agree with. The author states that a 4 cyl. engine has more time to burn the fuel/air mix than a 6 or 8 cyl engine because it has fewer cylinders.The fuel/air is going to burn at the same rate regardless of the number of cylinders.That cylinder doing the burning doesn't know how many others are connected to the crankshaft be it 1 or 7.He also says that the acetone molecules -physically- shake up the gasoline molecules.They may chemically vaporize them or aid in combustion in some way,but physically shake them?I'd like to see some more hard,independant test info before totally buying into the theory.Remember the old saying"If it sounds too good to be true,it probably is".