I doubted my seals are worn out also. I had to buy a "new" used from a 1989 300E(my sister blew the original engine's head going to Key West). The engine was in great condition and the car had 86,xxx on the odometer. It was rear-ended really bad, but still drove perfectly. I have put about 10,000 miles in the 4 years I've had the engine installed( I dont drive a lot). I was told by an "indie" to use 10w-30. Call me nuts, but I change my oil every 2 months(800miles) !!!!
I am glad this forum has showed me the PROPER oil weight to use in my car (20w-50). I will change my oil TOMORROW and report the results of my oil consumption.
in another thread.
Stay tuned..I could also be a success story
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