Yes - mine. It's as quiet and smooth as silk at 140k miles.... and uses that nasty old Pennzoil 10W-30, changed (along with OE filter) at 3k mile intervals. <img src="/forums/images/graemlins/smile.gif" alt="" /> In fairness, I did rebuild it about 5k miles ago. <img src="/forums/images/graemlins/wink.gif" alt="" /> When I tore it down, there was no evidence of sludge, varnish, heat scorched oil deposits, valve deposits or any other sign of damage from poor oil quality.... but also in fairness, I bought the truck with 130k miles and don't know what oil the previous owner used..... but - whatever he used, I'd have to question, since before I rebuilt it, the cylinders were egg-shaped, the rings were worn, one cylinder was 15psi below the others and it ticked like crazy. He probably used that terrific Castrol or Mobil 1. <img src="/forums/images/graemlins/lol.gif" alt="" />

C'mon guys - use a quality oil, change it often and rebuild your engine when it needs it..... no one should complain about the valve train on a car after 150k miles - particularly if you haven't owned the truck since new and/or don't know if the oil, filter and air filter has been changed at recommended intervals - or sooner with severe duty - or if the truck has been used for towing.

I've used Pennzoil in every engine - including marine engines, motor homes, lawn mowers and generators - since 1970 and before..... all were perfectly fine, except I did have one engine blow when the oil pump seized on a MB 300D.... with over 300k miles on the clock. <img src="/forums/images/graemlins/lol.gif" alt="" />

Those who run thicker oils as a remedy for low oil pressure are only buying time. Low indicated oil pressure with recommended 10W-30 is a sign you have problems with main bearing clearances or a bad oil pump. If the upper end is ok and you go to a heavier oil, you'll get better pressure on the mains, but flow will likely decrease on tighter clearances such as the valve train. Reduced flow in normal clearance areas will then result in less lubrication, more heat throughout the engine (approximately 1/2 of heat is eliminated via oil flow/heat transfer) and accelerated wear on otherwise good components will result - so while you're extending the time to a rebuild by using a heavier oil, you're probably increasing wear on more components and making for a larger list of replacement parts when the engine dies and a rebuild becomes mandatory.

An engine is like any other part of an old truck.... sometimes it needs some attention. <img src="/forums/images/graemlins/kewl.gif" alt="" />

Frank