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#1
05-19-2006, 04:40 PM
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Oil grade for 77 240d and 80 300sd
I have searched the net and this site without any luck.
For years, I have used Delo 400 but was wondering what else would work. Both cars leak and I have to add a quart or two between oil changes. The user manuals in both cars say to use SAE 30 wt or 20-50 oil. They do not mention any grade like "C..." or anything else. Does this mean that almost any motor oil can be used in these older cars? Thanks
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DCM 1977 240d 1980 300sd 1987 Chevrolet Suburban 
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#2
05-19-2006, 05:23 PM
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No, don't go just using any type of oil. Use a proper diesel rated motor oil. Some good ones that come to mind are Mobil Delvac, and Shell Rotella. Here's a good list of oils.
http://www.whnet.com/4x4/oil.html
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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate Sooner or later every car falls apart, ours does it later! -German Narrator in a MB Promotion Film about the then brand new W123.
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#3
05-19-2006, 06:09 PM
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I was told here a few years ago the DELO stands for Diesel Engine Lubricating Oil. Must be good.
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#4
05-19-2006, 09:22 PM
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I use DELO 15-40 or Rotella 15-40 summer and 5-30 Rotella or Mobil 1 in the Winter for my F350 and my MBs.
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1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12 1982 380SL 1978 450 SEL 6.9 euro restoration at 63% and climbing 1987 300 D 2005 CDI European Delivery 2006 CDI Handed down to daughter 2007 GL CDI. Wifes 
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#5
05-19-2006, 10:50 PM
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I also use Rotella or DELO 400 15W-40. I've used them in all my vehicles, gas or diesel, since 2003. Before that, I always had gassers and always used Castrol GTX. I've had suspension issues (lots), electrical problems (a few, mainly with the Lincoln I no longer own), and driveline issues (mostly limited to a Suzuki that I also no longer own), but I haven't lunched a motor since 1996.
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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar. 83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles 08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles 88 Jaguar XJS V12 94,xxx miles. Work in progress. 99 Mazda Miata 183,xxx miles.
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