Did he use synthetic or conventional? Even conventional oil changed regularly shouldn't do that but I guess there could be some poor oils still available these days.
I bought a can of that Mopar CCC probably 2 years ago and never used it. I had read some very good things about it though.
A forum community dedicated to Chevrolet Silverado and GMC Sierra pickup owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more!
