i ran rosmella until 17000K now have royal purple in the crank. royal will soon be in the transmission, transfer case, differentials, powersteering etc. they make unbelievable products with lots of PAO and moly!
dont let the wear scar info steer your vote!
all the oils i ever used in this truck stink after first putting them in so did RP but is smelled much heavier than any other oil i have used.