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#1
07-28-2006, 06:07 PM
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Oil brand and weight
Ok, I know this will open up a can of worms, but want to get some info from those of you that have had MB's a while. I have an 84 300D, which brand and weight of engine oil is best for it? It has approx. 246,000 on the clock, which as far as I know is correct...Thanks guys...
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#2
07-28-2006, 06:28 PM
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The "brand" with the highest "C" rating such as CF4 and meets your temp ranges. For summer, 15W-40 would be a very good place to start. (C= Diesel rated oil)
"Brands" are usually used for advertising reasons. Especially when the cost is very similar.
__________________
Sam 84 300SD 350K+ miles ( Blue Belle )
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#3
07-28-2006, 06:29 PM
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Just did the 295,000 mile service on my '82 300D. I use Delo 400 15W40.
Use any brand you want. Just make sure it is diesel rated oil. (The oil spec should start with a "C".) Cheers, Wes
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#4
07-28-2006, 07:19 PM
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As Wes said " any brand you want" as long as it is API diesel rated "C" ie. CF4
I had a 84 300SD that I ran almost exclusively on 15W40 (any brand on sale with C rating) from 67K miles when I got it until 312K when I sold it. Sometimes in extreme cold winter conditions I would run a good 10W30 when temps would stay around 0 to 25 deg. F. All of it dino oil...no synthetic!
__________________
 FREDDaily Driver: 98 E300TD 199K Hobby Car: 69 Austin Mini Past Diesels: 84 300SD, 312K 87 300SDL, 251K 94 Chev. K-1500 6.5Ltr.TD, 373K
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#5
07-28-2006, 07:53 PM
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Mercedes Engine Oil Recommendations
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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#6
07-28-2006, 07:55 PM
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A little synthetic can be a very good thing!
I am running Shell Rotella 15-40W. I thought all was well but a friend suggested substituting 1 quart of synthetic. He knew an oil company chemist who told him that you get most of the benefits of synthetic with just a quart mixed in with the regular oil. He may have been assuming a standard gas burner which uses 4-5 quarts. Well, I'm cheap so I bought a quart of synthetic and split it between my 98 Chevy 6.5L TD and my 83 Mercedes 300DT. The day after the oil was added, I heard something on my 300DT I had never heard before, the whine of the turbo as it spun up. I've only owned this car for a couple of monthes and although it has 240,000 miles on it, it was just sitting by a barn for the last few monthes before I bought it according to the PO. Anyway, bottom line is I'm going to continue to add some synthetic with my oil changes. Maybe even spring for a whole quart for the 300DT next time.
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#7
07-29-2006, 07:04 AM
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If you have deep pockets and expect extreme conditions for your engine, by all means Delvac-I or else the tried and tested Delo 400 or Delvac Super will do just fine.
__________________
99 Gurkha with OM616 IDI turbo 2015 Gurkha with OM616 DI turbo 2014 Rexton W with OM612 VGT
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