Delvac 1 is hard to find. I've never seen it at any of the auto shops or WalMarts I go to.

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1993 W124 300D 2.5L Turbo, OM602.962
2000 Chevrolet Cavalier, 2.4L DOHC
2002 Ford Explorer, 4.0L SOHC
2005 Toyota Prius, 1.5L

http://www.fuelly.com/sig-us/40601.png

I sit corrected. Thanks for the push.

Jeremy

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

What's 228.3 or 228.31 MB oil Specs?

With the 602.962's flat tappet cams ,
I'll always Opt for the Rotella T 5W40 Synthetic (I Know , It's not a stage 4 base)

No 10W30, Ever ('Don't care if Karl Benz,Himself,comes back and says it's O.K.)

Attached Thumbnails

 

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'84 300SD sold
124.128

Mobil 1 for truck and turbodiesel will be called Delvac 1, I guess it is not out there yet.

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2010 ML350 Bluetec
2012 Mustang Convertible

I wondered what that missing MB spec might mean.

I suppose I could make my own synthetic blend, half Delvac 15w40 and half M1 T&TD to save some $'s.

I'm used to 10k OCI's on my 4 banger gasser with M1 but am having problems with the idea in my new to me MB. I'm at 4k now with Delvac 15w40 and am having arguments with myself to let it go to 5k. If I could ever convince myself, and be comfortable with 7.5-10k OCI's with a synthetic in my diesel I'd do it. Mostly my uncertainty lies in my ignorance of the whole Soot level thing.

I compute breakeven costs with syns vs. petros and right now here are the numbers.

Using my currents costs for filters and oils:

Delvac @ 4000 mi OCI = Mobil T&TD @ 7000 mi OCI

Delvac @ 5000 mi OCI = Mobil T&TD @ 8700 mi OCI

I know this probably seems a little anal to some of you guys.

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1993 W124 300D 2.5L Turbo, OM602.962
2000 Chevrolet Cavalier, 2.4L DOHC
2002 Ford Explorer, 4.0L SOHC
2005 Toyota Prius, 1.5L

http://www.fuelly.com/sig-us/40601.png

Also, the fact that the motor oil lubes the injector pump causes me some consternation with extended OCI's.

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1993 W124 300D 2.5L Turbo, OM602.962
2000 Chevrolet Cavalier, 2.4L DOHC
2002 Ford Explorer, 4.0L SOHC
2005 Toyota Prius, 1.5L

http://www.fuelly.com/sig-us/40601.png

Use Delvac Super 15W-40 and if in extreme conditions like super low temps, use Delvac 1, Delo 400 is also another excellent choice. Mobil 1 is good for gassers but its rating is lower than all the HDEO diesel oils.

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99 Gurkha with OM616 IDI turbo

2015 Gurkha with OM616 DI turbo

2014 Rexton W with OM612 VGT

When we are refereing to Mobil 1 in this thread we are refering to Mobil 1 truck and turbodiesel which is different than regular Mobil 1 that is why the name change to Delvac 1 to reduce confusion.

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2010 ML350 Bluetec
2012 Mustang Convertible

Then its fine, Mobil-I generally stands for gasser rated synthetic which has lower C rating than HDEO oils.

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99 Gurkha with OM616 IDI turbo

2015 Gurkha with OM616 DI turbo

2014 Rexton W with OM612 VGT

OldWolf,

When I rant about the Rotella T 5W40 Synthetic in the Diesel there is a DisClaimer:
1.I treat the 5W40 just like it's a Mineral based Lube...3000 Miles and the Oil+ Filter gets changed.
[It's advantage is slightly lower cost and much more of a
Diesel additive package (CAN YOU SAY Zinc?) ]
2.As pointed out earlier,the OIL is the Coolant AND Lubricant for both the
Injection Pump AND the Turbocharger![AND Turbos BEAT the FOOL out of OIL]

DO NOT MIX: BRANDS , VISCOSITY(s) !
Nothing Good can come from "Playing" Petro-Chemist!

The Mobil 1 Truck and Turbodiesel [A.K.A. Delvac 1]is rated for C [Compression]type engines.

I would feel comfortable running 5K oil+ filter intervals with:
Royal Purple,Redline and Delvac 1 WITHOUT oil testing. (O.K. Amsoil Too)

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'84 300SD sold
124.128

I never had any cranking issues when running synthetic in the winter. The only time I had problems was with 15w40 dino which turned over real slow on those super cold mornings.

You can get that fake synthetic pretty cheap, Rotella T 5W40, which is a good oil and from my experiance with my 300SD still allowed the old 617 to crank over quickly.

After using both I would never run a dino oil in any old MB diesel in the winter.

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200

I used Shell ROTELLA "synthetic" 5w-40 (blue jug) for years in VW and Mercedes diesel best bang for the buck.

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1993 Mercedes 300D 2.5

1987 Mercedes 300D 3.0

2000 Volkswagen JETTA TDI diesel 5 speed

2002 Lexus ES300

2006 Lexus GS430

IYHO. Some of us prefer "real synthetic".

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1987 300TD 309, xxx 2.8.2014 10,000 mile OCI


Be careful of the toes you step on today, as they may be connected to the ass you have to kiss tomorrow. anonymous

“Be who you are and say what you feel, because those who mind don’t matter, and those who matter won’t mind.” Dr. Seuss

Mobil 1 5w-40 Turbodiesel is no longer the same as Delvac 1. It used to be the same when it was called Mobil 1 5W-40 "Truck and SUV." I believe they both have the same CJ4 rating, but the additives are different. Delvac 1 is the same formula as the old 5W-40.

It doesn't magically cost less than the new stuff, it's different!

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85 300D 180k

I change oil at home every 3000 miles so I do not need "real synthetic"

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1993 Mercedes 300D 2.5

1987 Mercedes 300D 3.0

2000 Volkswagen JETTA TDI diesel 5 speed

2002 Lexus ES300

2006 Lexus GS430