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Old 06-27-2007, 10:12 AM
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Join Date: Jun 2007
Location: Europe, Hungary
Posts: 8
your choice of motor oil for 'ye olde Diesel'

Just curious...

It's about time I changed oil & filter on my 1987 W124 300D Turbo. It has 300k+ miles on it.

Because of the high mileage, I was thinking about getting some heavy duty 15W-40 Castrol and MAHLE filter. What do you think of this? Would it be good enough or is it unnecesarry?

Oh, one more thing!
How often (miles) do you change your oil & filter?

Thanks in advance!

1977 W123 200D - the slowest car I've ever driven, 500k+ miles when sold
1992 W124 250D - 257k miles when sold
2002 VW Polo 1.4 - 100k miles when sold
1987 W124 300D Turbo - 320k miles
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Old 06-27-2007, 10:22 AM
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Join Date: Nov 2002
Location: Dallas
Posts: 802
Mobil 1 Turbo Diesel blend

OEM filter
Oil & filter every 3K miles....
As of 2/2010:
2001 CLK55 0o\=*=/o0
13.6 @ 106mph
10K mi
1984 300SD
260K mi and going and going...
97 S600
46K miles
1991 Sentra SE-R (extremely dorked with)
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Old 06-27-2007, 10:33 AM
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Join Date: May 2002
Location: Burbank, CA
Posts: 597
Rotella 5w-40 synthetic diesel oil, 7,500 miles filter and oil change.
'91 300D 2.5 Turbo 330K
'00 VW TDI Golf, 190K
'67 BMW R50/2
'73 Norton Commando Interstate
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Old 06-27-2007, 10:35 AM
Gurkha's Avatar
Satyameva Jayate Ad vitam
Join Date: Jun 2003
Location: Boondocks
Posts: 1,026
Delo 400 or Delvac MX, can't be beat. Delvac-1 or Delo synthetic for truly extreme conditions.
99 Gurkha with OM616 IDI turbo

2015 Gurkha with OM616 DI turbo

2014 Rexton W with OM612 VGT
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Old 06-27-2007, 10:39 AM
LUVMBDiesels's Avatar
Dead on balls accurate...
Join Date: Aug 2006
Location: Red Lion,Pa
Posts: 2,207
Oil & Filters

Rotella synthetic 5w40 (Can't find Mobil 1 Diesel around me) every two months
Mann filters every month

Do a lot of driving, 84 mile commute one way...
"I have no convictions ... I blow with the wind, and the prevailing wind happens to be from Vichy"

Monika '74 450 SL
BrownHilda '79 280SL
FoxyCleopatra '99 Chevy Suburban
Scarlett 2014 Jeep Cherokee
Krystal 2004 Volvo S60
'74 Jeep CJ5
'97 Jeep ZJ Laredo
Rudolf 86 300SDL
Bruno '81 300SD
Fritzi '84 BMW
'92 Subaru
'96 Impala SS
'71 Buick GS conv
'67 GTO conv
'63 Corvair conv
'57 Nomad
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Old 06-27-2007, 11:45 AM
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Join Date: Jun 2006
Location: NY
Posts: 710
5W-40 Rotella synthetic, Mobil 1 or Delvac synthetic every 5,000 miles all year around.
Ron Schroeder
'85 300 Turbo Diesel 2 tank WVO
'83 300 Turbo Diesel 2 tank WVO
Some former WVO vehicles since ~1980:
'83 Mercedes 240D
'80 Audi 4000D
'83 ISUZU Pup
'70 SAAB 99 with Kubota diesel
'76 Honda Civic with Kubota diesel
'86 Golf
Several diesel generators
All with 2 tank WVO conversion
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Old 06-27-2007, 01:01 PM
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Join Date: Sep 2005
Location: Miami, FL
Posts: 407
Lubro Moly Touring Hi-tech diesel oil 15w40 with a Mahle or Mann filter every 3k.
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Old 06-27-2007, 01:11 PM
Diesel Newbie
Join Date: Dec 2006
Location: Minneapolis, MN
Posts: 27
Rotella 5w40 synthetic and do a full change every 5k. I'm currently using the Bosch filter. I'll probably bump it up to 7.5k miles.

Their dino oil is also highly rated -- I've asked plenty of long time diesel folks and they swear by the regular (even running it in a gasser hot rod!).

But I opted for the longer changes and the ability to start without a block heater down to -4F.

Though when I changed to synthetic (it was 15 degrees!) I did start getting an oil leak. Turned out it was the drain plug -- a new one and a new copper gasket and now nary a drop.
Own: '85 300TD Turbo - 171K miles
Owned: '81 380 SEL - 180K miles
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Old 06-27-2007, 01:12 PM
POS's Avatar
POS POS is offline
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Join Date: May 2004
Location: Houston, Texas
Posts: 2,506
Delo 15w40 and a Wix.
- Brian

1989 500SEL Euro
1966 250SE Cabriolet
1958 BMW Isetta 600
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Old 06-27-2007, 01:15 PM
justinperkins's Avatar
I ♥ German Cars
Join Date: Sep 2006
Location: Austin
Posts: 1,312
OEM Filter with Mobil Delvac 1 (5w-40) every 5k.

The 603 loves it, 231k miles and running strong.

1987 300TD, 1987 300TD
2008 R32, 2000 Passat Wagon
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Old 06-27-2007, 01:41 PM
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Join Date: Jun 2004
Location: West of Ft. Worth. TX
Posts: 4,186
Anyoil that has a diesel rating (CF, CH etc... usually found in gal. jugs) and Mann, Mehle or WIX filters. Anywhere from every 3K to 5K miles, depending on conditions such as city/highway and hot/cold temps.

84 300SD 350K+ miles ( Blue Belle )
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Old 06-27-2007, 01:52 PM
Join Date: Jul 2001
Location: Old Lyme, Connecticut
Posts: 3,596
OEM filter, Delvac 1 5W40, every 8,000 miles, all cars including gassers. Jim
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)
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Old 06-27-2007, 02:03 PM
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Join Date: Oct 2006
Location: Boca Raton / NYC
Posts: 338
I use a good filter, either the Wix or the turkish Fram for my 617, I believe that any oil that has the seal for the API aprroval for the latest Diesel certification should be good. at that point I just pick the cheapest one. Sometimes it's Shell Rotella, sometimes it Castrol (RX?).
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Old 06-27-2007, 02:39 PM
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Join Date: Dec 2005
Location: Cloudcroft, NM & Hueco Tanks, TX
Posts: 63
i gotta wonder (pics)

for the experts, old guys, and accomplished mechanics...have you ever seen a failed MBZ OM motor and said to yourself (and/or the owner of the failed motor) "hey you should have been using xxxxxxxxxx motor oil instead."

does anyone drink their motor oil, new or used? then the choice would really matter, like beer. i choose

Rotella 15W40


comments, anyone?
1966 200D Fintail. "Flossie" 151k Dying a slow death.
2008 ML320 CDI 32k "Waiting for a name"
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Old 06-27-2007, 03:42 PM
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Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,389
Mmmmm, lager...

John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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