Originally Posted By: Ben99GT
I too would readily discount the slightly higher Fe levels, but I have to say Valvoline's sequence IVA claim has somewhat shaken my faith in M1.
If M1 5W-30 is really showing wear rates double the 90 micron limit in that test, that is just insane. Sequence IVA wear has some wear correlations with other engine parts too, such as piston wrist pin.
Yeah I don't think XOM should be held unaccountable if they did fail as poorly as Valvoline claimed. One outside shot is that they threw a hail marry attempt to keep them afloat. Big assumption. Regardless, the Seq IVA isn't that relevant to my particular driving style so I don't really care.