Post by
themadscientist »
https://forums.nicoclub.com/themadscientist-u2806.html
Thu Mar 08, 2007 6:36 pm
Good lord no! Many people use kerosene or seafoam but I am not comfortable drastically stirring up crud in the oiling system. I flush my newly-aquired engines with several oil changes and a lightweight dino oil like 30 weight castrol GTX. It is just my personal theory but I have had good results. it gently cleans the crud out rather than breaking loose big hunks of crap that can plug up oil passages. I had one particularly nasty motor that took like four changes with new oil and filter each time and a month of driving around but the results were impressive, the head looked real clean when I pulled the valve cover back off and the lifter noise was gone.