by compare on the dyno is good to show result but how long can perform and what is the engine performance after 5k, 8k, 10k, 13k or 15k mileage?
wear and tear on engine oil is very hard to judge beside send some sample to lab test.
been using Amsoil AZO series for some time, last time i intro my friend to use Amsoil racing oil in his drag car... abit reluctant to use at 1st later he gave a try he say it was good in performance on par or better and best part is price cheaper compare to other big brand