Ignore the 'premium' oil additive hype, found out the hard way in Tulsa

Local parts guy talked me into a slick marketing oil additive last fall, swore it'd fix my 6.7 knock. Dropped 80 bucks on it, ran it 200 miles, and the knock got worse. Pulled the oil pan and found sludge chunks. Turns out that stuff just suspends crap instead of cleaning it. My old buddy runs a fleet shop and laughed, said just use the cheap full synthetic and change it on schedule. Has anyone else had a snake oil product make things worse before you got real evidence?

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john_cooper23d ago

Heard the same story from a diesel guy here, and his take was that those additives stir up all the gunk that's been sitting harmless in the pan for years. Once it's floating around, it gets into the pump and bearings instead of staying put. So you might've been better off never touching it.

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