This topic has been discussed at length, but not in relation to rating. I was looking for something to put into the old Dodge van, the beach rig, to stop oil consumption a little. It quieted down quite a bit after an ARx treatment, so thinking of some heavier oil to use. I was reading the labels; Castrol and MaxLife both say they "exceed SL ratings" without exactly saying they are SL. On the other hand Quaker State says its HM oil is SJ. Would this indicate that the QS has more anti-wear additives than the others? Isn't that the main difference between SL and SJ?
Mike
Mike