In my 50 years as a professional automotive technician and vocational educator, my best advice ... Here's what these test stripes analyze: Hydrocarbons: Detects unacceptable levels of gasoline or ...

CR’s experts explain how oil works ... which is the best for your car. "In a pinch, most any motor oil will do an adequate job and keep your engine from exploding," says John Ibbotson, chief mechanic ...