Delo, Delvac, Rotella, and Rotella T can all be found and Walmart and purchased in gallons.

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95 E300 Diesel 200K

The previous owner of my car apparently used 10w30 because he's got a quick-lube sticker on the windshield. I assume that's all those places put in.

I will be using nonsynthetic Rotella (which is 15w30).

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1982 240D automatic
Odometer quit at 307K...about 325K now

Anyone have any success with Mobil 1 Extended performance (the "15000 mile oil") in a 10w30?
I have been using it for about 10,000 miles (changed every 5000) and have had no problems that I can tell. I'm mainly just wondering if their is any advice against it.

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'81 300D - swapped to a 617.951 turbo motor with a 150 amp alt.

Its not a diesel rated oil.

What exactly make an oil Diesel Rated or not, I understand that there are different specifications for oils. Mobil one claims to meet these standards; ILSAC GF-4 ACEA A1/A5, B1/B5 API SM,SL/CF.
I don't see any of the aforementioned "I" or "J" post fixes to the oils certification. By not having the certifications of CI or CJ does that mean that this will not work in a Diesel engine, or just that it will not keep itself as clean as a "Diesel Rated" oil would. BTW this is all out of raw curiosity.
Also is there a full synthetic diesel rated oil on the market?

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'81 300D - swapped to a 617.951 turbo motor with a 150 amp alt.

Not sure I would immediately assume that. My local (or at least the only one I will use) uses Rotella T 15w40 in all Diesel motors that come through there. One thing I do like about them.

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1983 300D-Turbo - Deep Blue w Palomino MB Tex (total loss in fire 1/5/09 RIP)
1995 E320 W124 Polar White/Grey Mushroom MB Tex
2005 F150 Supercrew - Arizona Beige - Lear topper
1985 Piaggio Vespa T5 - Black and Chrome

www.cphilip.com

All semi truck drivers use the Delo....that has to say something. When I had my manual 240D in southern California I ran straight 40 weight because I had alot of blow by. When I would use the 15W30 i could noticbly see my oil consumption rise. With the thicker oil, it doesn't allow as much oil to pass into the combustion chamber. It definatly depends on where you live....here I would run 15W30 only for december and january and then go back to the 40 weight.....it just depends on how much money you got.
-Stephen

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68 250s SOLD
78 300d non turbo SOLD
1980 240d manual SOLD
1981 300SD 360,000 miles I think she's doomed for a parts car but has a good engine SOLD the engine to spamman
1977 300d non turbo SOLD
1985 300SD california car
1978 240D Manual