Just to clarify. I have used Redline synthetics, oil, gear oil, trans fluid, water wetter, SI-1 Injector Cleaner, etc. in my 97 Z3 2.8, 84 733i (had used conventional oils prior to my purchase. Sold with 240k on her with no overhauls or problems), 91 750iL, 98 M roadster, 91 318is, 79 Chevrolet pickup and my 97 Chevrolet pickup. I had no adverse conditions, no break downs (lubricant related), and no engine, trans, or diff noises. I still use Redline products today.