I need to find a good oil for my 12v cummins. It’s fully built, 16:1 compression, roughly 65psi boost, 140# over stock valve springs with hardened pushrods. Originally built for a drag truck, now it’s in what I want to be a daily driver and tow vehicle. Turned the power down to about 550-600, so nothing crazy. Just need some oil recommendations to help longevity with all the extra stress in the valve train.