Hi guys,

I have a 1985 300D and its oil level keeps dropping. The shop said it is blow-by - an expensive problem to fix. Is this common in the MB 300s? I am currently using 15W-40. Should I go to a heavier oil to help solve the problem?


Thanks a bunch!


John

Loosen the oil filler cap while its idling with the engine warmed up...does it move around much? If it wobbles then blowby is "minimal" if it sits still then you can say there is "none" if it blasts off into the sky then you have "a lot" of blowby. Check this and report back with your findings.

I'd not recommend a heavier oil.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

More likely is that its leaking oil.

Agreed.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

Doesn't it have to be a pretty obvious oil leak to affect the level significantly? Seems like you'd notice some pretty big patches.

__________________
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1982 300D, anthracite grey, 260k miles, Greasecar
1999 E300D, black, 160k miles, Greasecar
2010 Honda Insight Hybrid
http://www.chuckwyatt.com
http://www.wordimpressive.com

.........or the turbo is consuming it.

jbecker1980 is your car smoking at all and if so what color is it?

__________________
84 300D, 82 Volvo 244Gl Diesel