Didn't know that. I use Shell Rotella in my lawn and garden equipment and Pennzoil semi synthetic 2 stoke oil in my outboard.
I used only Valvoline for years until they started marketing recycled oil for the same price as normal oil.
Just not sure yet about the new Pennzoil. I guess I'll watch and see what Roger Penskie (sp) does in his race cars?
A friend works in one of Penskie's Mercedes dealerships and he tells me the Pennzoil Ultra (Old Version) is certified to work in the new Mercedes.
I wouldn’t use race cars as a measure of oil value.
First the operating conditions are totally different. Good example - cold starts - race cars have the oil warmed with electric heaters before starting - your car starts in 20 below.
And second, the stuff race cars use is custom blended.
If you want to find a bunch that makes FReepers look downright agreeable, surf on over to bobistheoilguy.com
They argue about oil molecules like we argue over free trade LOL.