This is Why I Don't Change My Oil

[patrickt]

Originally Posted by hauss

Now I know why you do not change your oil. You are saving for a new car. I would like to see your new oil, compared to you used oil, test results .That would be better .

This was a VOA of Brad Penn that I had performed back in 2007. I recall that sometime after that there was some discussion that Blackstone was not measuring Zinc/Phos correctly for several manufacturers of oil (this was when the cam lobe failures were going on), of which BP was one, and those numbers went up across the board for several manufacturers. BP has always stated in their literature that their Zinc/Phos numbers were and are, as I recall, closer to the 1500 mark. Regardless, I always add a bottle of the original GM EOS. GM changed their formula maybe 15 years ago but I have a couple of cases of the original stuff. That is why in my UOA you will see my Zinc/Phos numbers a bit higher along with some of the detergent numbers. My used oil analysis from last year, which was four year old oil, was in the very first post of this thread.