I like your thinking Les...but, I did a lot of testing in the early days of Mobil 1, as we were sending samples of my big rigs oil in every oil change, so I would include my Vette's oil as well. I use Shell Rotella in the diesel truck, and staying with Mobil 1 in my cars, lawn mower, but I have tried different synthetics in the Harley as it does built a lot of heat.... Still a wise thing to do though, so I will enjoy the read...