I'll look up my filter for the 2QM15 at lunch today.
I just use standard heavy duty diesel engine oil. Pennzoil. I think I put in 20W last time as our PNW waters are not very warm.
On a related note, what oil pressure does your engine run at after it is thoroughly warmed up?
Hot-tip: Home Hardware has a drill-pump for $10 that drains my crankcase in about 30 seconds.
Hot-tip Plus: the 2QM15 installation has enough room to install a drain plug in the pan for easy oil changes. I plan to do this (someday).
