I did the same type of impartial testing about 20 years ago when a bunch of my fellow teachers were consisdering investing in a Slick 50 distributorship. (Many thousands of dollars!) When the series of tests showed a 5% LOSS of horsepower and higher engine temps after the stuff was added according to the manufacturer's procedures, they backed out of the deal.

It's simply impossible to repeal the laws of physics, no matter how persuasive the sales pitch is. Lies are still lies, no matter how they're sugar-coated!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!