We have a 1998 Mercedes ML320 with the 3.2 liter V6 (the 112 engine--only engine available in '98). When we moved from Texas to Michigan I switched to M1 0W40. Every winter since then (East Texas doesn't have winters) I noticed a buildup of gunk under the oil filler cap. A lot of Mel owners reported the same problem on the Mercedes forums, so I didn't think much of it--they all do that. Even after a 100 mile drive, if the weather was cold the peanut butter was under there.
Couple oil changes ago I switched to Red Line 5W40, to get the viscosity up a bit and I was not satisfied with the varnish that built up in the engine on the 0W40. This winter I'm not seeing any residue, the cap looks the same as in the summer!
Just posting an observation for whatever it's worth. 201K on the car, runs like new.
Couple oil changes ago I switched to Red Line 5W40, to get the viscosity up a bit and I was not satisfied with the varnish that built up in the engine on the 0W40. This winter I'm not seeing any residue, the cap looks the same as in the summer!
Just posting an observation for whatever it's worth. 201K on the car, runs like new.