Hi 'dude,
yeah, that's an old favorite but you'd better be able to interpret the Runes on the side of the can to make sure that WallyMart are still selling the good stuff.
Seems the EPA EcoNazis have castrated the ZZDP out of diesel lube too.
Fred,
Hmm....
So, I read the interesting Ford article noted above (thanks, Gary). I am asking myself, however, If the internal stressors in our old engines are in the same league as the new Super Duty Diesel Ford engines which probably are expected to run 5k miles on their oil before the oil analysis is done? That is, do our XS650's really need the similar protection, especially if we dump our oil at 500 or 1,000? And we are not racing them (I don't) at high RPMs ?