Sludge shock
“I just bought a 2005 Dodge Ram 3500 with the Cummins 5.9 with 211,000 miles. It had no service history, the oil looked the worst I’d ever seen, really black and gritty. I used the Flushing Oil Concentrate like you said, and I was was shocked at what came out with the flush, there was so much sludge and who knows what. The oil now is much better, but still is a little dirty, so I’m planning on doing a follow up flush in about 500 miles to get it completely cleaned up.”
J.D. LA