I don't agree with this article. It's his opinion - what credentials does this guy have that makes him know-it-all?
And the BS about if your machine comes with synthetic, drain it out and put in petroleum for break in?? Ok all you Vette, Viper, Mercedes and BMW owners, you heard him.
Give me a F'n break - this guy's reminds me of a snake oil salesman.
Sorry, I don't believe everything I read on the web.
I work for a car manufacturer. Not saying I'm the expert, but I know a little about what goes into engineering an engine.