full synthetic to clean dirty engine

[Arctic388]

do you want to clean it or do you want to really clean it? don't laugh. I started "cleaning" an engine at 213K and now over 250K and still having fun doing it. I have proof that PU cleans slowly and to really make things exciting put some ZMAX in there for 1000 miles but you have to be willing to change filter often. if not they clog up if it really is dirty to begin with.

here's my proof.

https://www.youtube.com/playlist?list=PLPi_s5p45KGvZfDqHnY1lupx-HVUMkhqy

seeing is believing . . .

 

[surfstar]

I just posted pics of my Civic. Unknown OCI history to 142k miles, then Penz Syn to 171k (I have no idea if it was 'dirty' prior, though)
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