I was wondering if anyone has information on the HPOP and the oil inside. I change my oil very frequently (I've been told I'm wasting my money), because when I first bought my truck the changes were as close as 2k. I pull a fairly large 5th wheel and I figure the oil is cheap insurance. I recently converted to Rottella/Sycn. and pulled the oil out of the pump and replaced it. The removed oil from the pump was alot darker then the oil from the pan. Any ideas, thanks Joe..99.5 P/S, 68k. Baldwin open air, Banks Trans Command, Waterless non pressurized Coolant.