It was my understanding the problem was in low RPM lugging of the engine that caused the problem. FCA wanted to increase the viscosity of the oil to offset this but of course that needed EPA approval. I don't know if that was ever approved.


"Follow me the wise man said, but he walked behind"


'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.