This truck has been a log hauling truck with a crane, loading logs in the woods and then transporting them to the saw mill 10-12 hours per day 6 days a week it's entire life - since I purchased it in 2000.
I had the engine torn down by a friend who use to work as a technician for a Cat dealer. It was torn down because of coolant pressure in the radiator overflow tube leaving coolant in a puddle on the floor each night.
He found the top rubber o-ring seal on one of the cylinder liners was broken as well as a leaking head gasket on the same cylinder. Because the engine had 36000 hours on it with PMs done at every 400 hours, I decided to completely rebuild it.
The man who tore it down was amazed at the very small amount of wear on the rod bearings, main bearings, and crankshaft. Pistons and liners were in excellent condition. The original cross hatch cylinder liners were still in decent condition. There was very little scoring on the rocker arm contact points. Along with the Delo 400 CI-4 Plus, I use Delo Gear ESI 80/90, Delo Trans ESI, and Delo Grease HD for all of my equipment. Since John Costa of Ocean State Oil began selling me the Delo line of products I have become a believer in Chevron over any other oil company who has come in my door.
I appreciate the great service Ocean State Oil has given me in regards to my lubrication business.