Billdog350

I had around 160k on my 2003 6.0l when I sold it...ran perfectly, no smoke, didn't burn a drop of oil, got about 13.5mpg avg, no knock, no maintenance except for all new exhaust manifold bolts (heads started popping off the bolts and exhaust leak started), and new plugs and plug wires around 140k. One of the best motors I've ever had.

2003 2500HD 130k, motor is mint...tranny just got rebuilt.