I am strict about meeting specifications for my vehicle's lube. For instance Mopar spcifies AT4 for my toad's transmission. Since most of the AT4's cost about the same I use genuine MoPar fluid. Quicksilver's transmission and auxiliaries are Fuller Road Ranger. Fuller specifies 50 weight mineral oil for all three boxes. The SQHD axles want a specific spec gear oil. Ditto. The Stemco wheel bearings also specify mineral oil.
Same for filters. Cummins approves Baldwin filters so the engine gets a B88 filter. Same for the C750L Luberfiner bypass filter. Fuel filters are a pair of RAcor's. I chose the 1-micron S elements.
Maybe I'm too picky. After all, ALL TIRES, have to meet federal specs so what's the difference? Engine Oil? Both Delo 400 and Shell's Rotella T have earned good reputation among truckers for a reason.
I got carried away changing ATF fluid. Dropped the pan three times on the toad. Got the sniffles at the cost of the transmission fluid. The tears dried instantly when a priced a reman MoPar transmission.
