1 Mobil1 m1-303a from walmart for the first change in my built motor Duramax, which will be going back in the truck in 2 weeks. Has my last Baldwin B1441 on it for first initial fire up and few hundred miles once its back in and running, should be about 800whp until I get more fuel. The Mobil1 is a new manufactured one, not a M&H. It was always my preferred filter, then I got a few Baldwins and liked them too, just have to order them.
The truck has 278k on it, 2011, broke the crankshaft 10/2023. Bought it in 2017 with 191k miles, ran exclusively Rotella T6 in it for 7.5-10k miles. Took it apart, everything looked beautiful, no sludge anywhere. Bearings had very little wear, except where the crank broke and spun the rod bearings. It still ran though. Currently have 10 gal of mobil delvac 1300 15w40 for it.