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Originally Posted by rdanz
"Gunk" makes an excellent engine flush add to oil allow engine to idle 15 minutes drain oil and remove filter. when adding fresh oil add 1 qt.Marvel Mystery oil in place of 1qt. oil + remainder of fresh oil and filter.
I have done this with 3 cars, Chevy, Volks,BMW and it has worked with each.
This problem usually happens when oil isn't changed often enough when you drain the oil after the flush you will probably see globs of sludge in the oil.
Good luck
Change it hot and change it often is a good rule.
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I apologize for disagreeing. Your method will get alot of gunk out of the engine, but is quite harsh. I am inclined to go along with the flushing portion although it is not the approach I would take. What I take issue with is putting MMO in with a fresh oil change. The additive package in modern premium oil is quite good. MMO is an ancient remedy and does not work well with the modern oil additive package and will likely do more harm than good.
The safest way to get an engine flushed and keep it that way is to use one of the oils I indicate or any other CI4 rated oil. Once the engine is cleaned out use your favorite premium oil with ADEQUATE oil change interval.
Thanks for your post and have a great day,