Amazon engine oil vs the world

[Karl]

Originally Posted by secondchance

After 35 years of Mobile 1 starting with 84 Z51 Vette 4+3, I am calling it quits and switching to Amsoil Z-Rod 10W-30.
It's interesting to see that Mobil 1 FS and FS X2, both specific to european cars, still contains 1000 and 1100 phosphate and zinc respectively. Could it be OHCs Mobil is concerned over?

I am going to start using the Bradd Penn synthetic motor oil.