I thought this stuff had been proven to be just tinted mineral oil and was backed up by fraudulent test results and claims proven false by the Federal Trade Commission a few years back. Anybody use this stuff? With all the new adds on tv and with Carroll Shelby's stamp of approval... have they changed something? Is he just pawning his name and reputation off for a quick buck on some snake oil? Z Max claims Better engine protection from wear. Better horse power. Better gas mileage.