After 1 million,122 Thousand miles on my Detroit 500 I decided to have the Engine rebuilt. I've used Lucas Oil Stabilizer relighiously and when they tore the engine down the mechanic said it was the cleanest engine he ever saw. There was no wear on the bearings, so in reality I am wasting my money rebuilding the Engine, but no problem with LUCAS I know it won't need to be done again. Thank you Lucas Oil for developing this product.