Haven't checked (UOA) but it's at 14000 out of a possible 25,000. I'm going to run UOA at 15,000, which should give me enough advance notice to dump if my Smarty is putting too much soot into the oil. I ran 0W30 Ser 2000 on my gasser and never had a bad UOA. Never changed the oil, just replenished at filter changes and had to add about a quart every 5K (it was like that before swapping to Amsoil). I guess, in reality, I was getting 100% new oil every 15K that way, anyway. Was running bypass, which I haven't put on this yet. That's a project for the fall. BTW, minimal oil consumption on this rig.