2001 Dodge Ram 2500 diesel
Out: Rotella T6 5w40 supplemented with Redline Oil Additive, Fram Ultra filter, 17k miles
In/Out: Rotella T4 15w40, CARQUEST filter, 4000 miles
In: Valvoline High Mileage Turbodiesel 15w40, Fram Ultra filter
Two oil changes in quick succession here. First was due to the truck being in shop for a head gasket change, which turned out to include a new cylinder head. The shop installed the Rotella T4 and CARQUEST filter without asking, but I figured on dumping whatever oil they put in it early because the engine had been opened up.
I was planning to run the T4 until the oil level got down to add, but a hidden stump in a parking lot forced a premature oil change when it dented the oil pan. So I had a new pan installed and supplied the Valvoline HMTD and FU filter to the shop.