30K Miles on my AXIS Stage 3. I run the Rotella 15W40 and change oil every 800-1000 miles.
20 psi pump tune and 29 psi Q16. The SB is hands down a work of art. I currently have a blown head gasket and even with a blown head gasket the engine is not burning oil not boosting though
(yes I'm pulling it and getting it fixed this month)
Someday I will match the SB up with Ron's Signature Series Heads.