Bothers of the Benz!
In reading the reports of stem seals and valve guides makes me sad for those who haven't had the performance as I have gotten.
My 1987 300E gasoline engine is approaching 200,000 miles and past an air leak down and compression test.
The stem seals are still pyable and sealing.
His oil consumption is 1 1/2 qts at change time, 3500-5000 miles.
Mobil I 15-50W. and filter.
There is an article in The Starr Magszine on this subject; fresh oil and stem and valve guide life.
You must change the motor oil.
My engine has never had the cam cover removed.
I had better quite bragging or it will blow up today.
Happy Trails Beep Beep from the Spiderman in Houston!!!