My friend sent his Amsoil hydrostatic transmission oil 20w-50 for voa (Blackstone Labs).
I asked him about the Zn & P ppm levels.
They were the following:
Zn = 1351 ppm
P = 1074 ppm
Definitely not API SN maybe old school API SG level
I asked him about the Zn & P ppm levels.
They were the following:
Zn = 1351 ppm
P = 1074 ppm
Definitely not API SN maybe old school API SG level