An expensive lesson learned

[oldgold70c10]

Originally Posted by rustyrodknocker

my next point is the vast majority of these old rigs [meaning millions] are running off the shelf motor oil. If it was devastating to flat tappet motors, these trucks would be stacking up in the ditch.

Thank you. Based on what a lot are saying in this thread, all of my rides should have had wiped cams 5 or 6 years ago. For several years, before I rebuilt my truck's engine, I used the cheap Q-state oil, and it was lucky if I changed that oil every 10,000 miles! It had 212,000 miles on it and still ran down the road when I pulled it. I don't use Q-state any more and change oil every 3,000 miles, but I don't worry about ZDDP, and they still work. I don't have any non-stock, aggressive cams either.