99 320E oil consumption problem
 

Friend's 99-320E with six cylinder, 85,000 miles needs a quart of oil every 800 miles. It also appears to have evidence of blow-by under the oil filler cap. He's had the car for a few years (since 25,000 miles), has all recommended work done at the dealer (including oil changes). Is this a problem or is it just a characteristic of the vehicle. If not can anyone give me any idea about the costs to correct his problem(s). I'll greatly appreciate any feed back that anyone can offer.

Agreed - moved to Tech Help.

I believe Mercedes lost a class action lawsuit regarding the issue on M112 engines with Dino Oil Changes every 10k-12k miles. Result was they had to cover certain engines for an increased warranty period for oil consumption. Do a search and you should find more info.

Unless the car has seen very few oil changes in its life, I agree with Zeus and the Swede. These engines are amazingly well built and oil usage is just not an issue with them. I would explore the crankcase ventilation issue to the fullest extent.