I have the standard bosch coppers H9DC
Would you say that the 10w-30 oil is too thin and leaving past my valve guides?
I drive about 100miles a week and I add about 1/2 quart a month, so its about 1/2 quart every 400miles, in city driving. I rarely drive highway.
Will 20w-50 oil stop the fouling( by being too thick to past through the valve guides)??
The H9DC bosch comes pre gapped, should I adjust the gaps higher than how they come??
1987 mercedes 300E
1995 e320 conversion(hated the 300e grill)
Monochromatic Paint (Custom Blue)
Flat Badged (front)
custom "carbon fiber" console
18 inch HP EVO rims
Sold! Now I drive a Monte Carlo SS