Just brought her home tonight! Not the one I expected but she is a real power house! Many hours of research & thinking have past! I have chose to run with 1 full year OCI... Shell (GTL) Rotella T6 5W-40 & 8oz ZDDPlus to boost the Zinc / Phosphorus levels with a Fleetguard Stratapore or RP Filter. Later I will be adding a single stage oil by-pass unit. My main concern is only using a CK4 rated Oil! Don’t run a CK4/SN rated Oil—->This Oil will contain lower levels of ZDDP. (Not a good choice for a hard working Diesel engine.) Front Differential = Red Line 75W-90 Transfer Case = Mopar ATF+4 Transmission 68RFE = Mopar ATF+4 —> When the new pan is installed. Rearend = (Combo) Red Line 75W-90 / 1Qt 75W-140 These new fluids will be swapped over within a period of miles/time. Mostly all done next spring/summer. I want to get through all the initial (break-in) wear metal period. Mainly between 10-20K miles. Then drain all the fluids.