I use amsoil 20w50 at about 8-9.00 a quart it probably won't be worth the extra money, though the engine temp is lower and at 2,000+ miles so far it hasn't lost its shift qualities, with rotella t 15w40 it was starting to get clunky and harder to find first by now, i'll let you know more at 4,000 miles i probably will go to synthetic rotella 5w40 next year and see what that does, but for what i've seen there will be no more conventional dino oil for me again, with the cost dis-advantage for the different synthetic oils, which synthetic oil is most cost effective solution is what i have been trying to figure out.So what do you think, worth the extra $$ ??
the down side has been the leaks, still a good gasket is a good gasket, a bad gasket is well a bad gasket, don't think it's the oil there.