Oil Additive

If I may chime in here,
This exact topic of discussion came up over the holidays at my inlaws house.
My father in law's opinion was that execpt for the extra zinc and phosphorus needed for break in, all the additives you need are already in your oils.
You may say so what, what does your farther in-law's opinion mean to me?
Well he was, for the past thirty years, in charge of Exxon's oil additive program as their lead Phd chemist. He will also tell you to get a tank of chevron and run it through your car or get a bottle of Techron and pour it in yout tank in spite of the product being produced by the compitition.

Just my .02
Andrew