I own a trucking company ordered 3 brand new glider trucks 389 peterbilts with cat reman engines (550hp) going on 3 years old now around 480k miles and I have one truck that has had high copper in the samples started out at 88ppm of copper brought truck in and dropped oil as soon as I seen that to try and clean it up didn't do anything really... now have 598ppm of copper in the oil once I seen this I pulled the pan off and rolled main bearings and rod bearings in it then installed new oil cooler, checked air compressor oil pan and it was clean, found one main bearing that was rubbed down to the copper and one rod bearing, just upset bearings should last 750k miles not 500k miles ......the sister to this truck has the same problem but instead of it being a gradual increase it just spiked from 12 ppm to 348ppm of copper in the oil, live in south Dakota, use Schafer's oil supreme 7000, sales men and lab scientists all tell me I am good to run 20k miles on there oil after seeing these bearings and going through this I am having a hard time believing in there product, we have been using it for 20 years and never had a problem sales men blamed the cat bearings well that's [censored] in my opinion I use to work at CAT was a engine specialist there and I never ever seen this before, this oil is a 50 to 50 blend of regular deo and synthetic at CAT they just use regular deo, and the oil change interval was 12,000 miles at 550 hp the more hp you run the lower the miles you run on your oil these guys are telling me that doesn't matter I am just looking for a answer on this if someone could help me figure this out I would appreciate it. Its not just the reman engines I have 4 other trucks that are starting to do the same exact thing.
thanks guys please comment If you have any ideas
thanks guys please comment If you have any ideas