Hi... I'm new to this forum and need some help. I bought a 190D 1987 normal aspirated low mileage MB. I love the car but noticed my oil viscosity has sudenly increased. a short history. I bought the car in the US and immediately took it to an MB dealer to have fluids changed. Oil and filter were changedusing Mobil 1 5W40 synthetic. No problems.4, 000 miles later I took it to a garagespeializing in imports and the oil was changed - unfortuately I did not specify which type adn they used a regular 15-40 oil. About 2,500 miles later I noticed the oil is thickening, and I got soem slight valve noise.

I also noticed the owners manual that came witht eh car is for teh 190E. Any suggestion on oil capacity, specifications and type of oil best to use in a low mileage car. Some people here say use synthetic (cold winters) others say never put synthetic int eh older cars. Help??

 

Try Rotella synthetic. Truckers use it and look how many millions of miles a common rig has on it. That's what I've been using on my low mileage 190D and I haven't had any problems period.

With the oil capacity, just keep filling up until (on the dipstick) the oil is between the two notches.