A friend of mind talked me into trying this fuel catlyst. Says its the shit. Lowers emisions, ups fule economy by as much as 30% in some rigs( best ones so far are 12v Cummins diesels. Suipposed to keep your oil cleaner, engine run cooler etc etc. Any of you guys ever heard of this stuff. I've run it through two tanks of gas in my '78 Chevy sb400 3/4 ton. It seemed to get a little better mileage- maybe 10 %.

sounds like acetone in a fancy bottle.