Ive been with dodge since 2000ish, I cant get a HONEST answer out of anyone in engineering. So my father in law bought a 17 RAM Rebel. its his good truck, dosnt drive it every day. Its been average of 95 plus here lately. in this truck I use the big filter, and run the synthetic oil we sell at the dealership. 5W20 penzoil platinum oil.

HERENDOUS lifter clatter on start up. I mean like a 30 second count. Im convinced its oil drain back in the HOT ambient temps.

Our 6.4 hemi in the 3/4 ton didn't do this, but it ran 0W40 synthetic. It also had MDS...

Is it possible to run the 0W40 in the 5.7 to possibly keep this thin as PISS oil from draining back so bad?

Oh and theres several trucks on our lot, one a 5.7 Rebel that does the same thing.

Thanks

Kasey