I am using Delo 15w40 in a Ford 4.9 and have been in many discussions re: zinc and phosphorus levels and their effects on cats and engine deposits, but I was thinking...
This is a 1992 truck that specifies an SG motor oil. I know that zinc and phosphorus levels have been dropping as formulations evolve for gas engines, but what were the zinc and phosphorus max levels for SG formulations, and how do these compare to the current levels in most diesel oils?
I am wondering If I am closer to an SG with a universal HDMO than with a gas-only SL formulation?
thanks,
Matt
This is a 1992 truck that specifies an SG motor oil. I know that zinc and phosphorus levels have been dropping as formulations evolve for gas engines, but what were the zinc and phosphorus max levels for SG formulations, and how do these compare to the current levels in most diesel oils?
I am wondering If I am closer to an SG with a universal HDMO than with a gas-only SL formulation?
thanks,
Matt