I have been using Super Tech Fuel Injector & Carburetor Cleaner and Super Tech Fuel Treatment in my 2006 Chevy HHR for ~ 6 months now. I use the injector cleaner one month and the gas treatment the next. I don't have any problems with my car, I'm just using it as a preventative measure. I was wondering if the Super Tech brand does what it should, or if I should use a name brand like STP of Gumout. Is the Super Tech the same stuff or is it just a waist of money?