I've just acquired a 1982 Mercedes 300CD with the OM617 I-5 turbo diesel. Approx. 160K miles (odo stopped working not too long ago at 149K) with 15w40 oil changes at an import shop every 3-4K, according to the PO. Hadn't been driven in about a year until I acquired it this week, but was started at least once in that time. Unsure when the last OC was but, of course, oil is black.
I've inspected the car pretty thoroughly and taken it on several
From reading up on the old MB diesels they can get soot in the rings if not driven well or maintained perfectly, causing low compression and blow-by - I'm sure the maintenance has been more than adequate but wouldn't be sure that the PO ever used fuel treatments or really blew the cobwebs out of it. Before being retired from DD duty a few years ago its commute was about 30 mostly-highway miles, some short trips in the suburbs, and an occasional 175-mile jaunt on the interstate. I'm going to change the oil one way or another before setting off for home, but I'm curious what you BITOG'ers think I should do initially to de-mothball the engine and get it internally limbered up and cleaned up best. Normal fill from here on out will be Schaeffer's 9000 5w40 at 6-10K OCI depending on oil performance (maybe do UOA) and driving conditions over the OCI.
1: Cost effective 5w40 (Rotella, Delo, etc.?) with Seafoam right off the bat, and change again soon after I get home (approx. 500 mi.)
2. Same oil as above, but treat fuel with Seafoam, diesel treat, etc. instead of oil for the run home. (Then maybe run that OC to 1,000 mi. with Seafoam in the crankcase for the last half?)
3. Two or three 1-2K OCI's with afore-mentioned oil but not extra treatments.
4. Schaeffer's for 3-4K with Seafoam for the last 500 mi.
5. Begin my intended regimen now, no special treatment.
Other?
Also, what fuel treatment will be best initially, and as a periodic maintainer? I've liked the results I've seen with Seafoam but that was in gas vehicles and this is my first foray into diesel-dom.
I've inspected the car pretty thoroughly and taken it on several
From reading up on the old MB diesels they can get soot in the rings if not driven well or maintained perfectly, causing low compression and blow-by - I'm sure the maintenance has been more than adequate but wouldn't be sure that the PO ever used fuel treatments or really blew the cobwebs out of it. Before being retired from DD duty a few years ago its commute was about 30 mostly-highway miles, some short trips in the suburbs, and an occasional 175-mile jaunt on the interstate. I'm going to change the oil one way or another before setting off for home, but I'm curious what you BITOG'ers think I should do initially to de-mothball the engine and get it internally limbered up and cleaned up best. Normal fill from here on out will be Schaeffer's 9000 5w40 at 6-10K OCI depending on oil performance (maybe do UOA) and driving conditions over the OCI.
1: Cost effective 5w40 (Rotella, Delo, etc.?) with Seafoam right off the bat, and change again soon after I get home (approx. 500 mi.)
2. Same oil as above, but treat fuel with Seafoam, diesel treat, etc. instead of oil for the run home. (Then maybe run that OC to 1,000 mi. with Seafoam in the crankcase for the last half?)
3. Two or three 1-2K OCI's with afore-mentioned oil but not extra treatments.
4. Schaeffer's for 3-4K with Seafoam for the last 500 mi.
5. Begin my intended regimen now, no special treatment.
Other?
Also, what fuel treatment will be best initially, and as a periodic maintainer? I've liked the results I've seen with Seafoam but that was in gas vehicles and this is my first foray into diesel-dom.
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