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1987 W126 420SEL, 2006 F350 Super Crew Lariat 4x4
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225 Posts
Discussion Starter #1
I just changed my oil about 2 weeks ago. I've since gone 2000+ miles.

Before the oil change I had to add a quart every 1000 miles.

I'm happy to report I have not had to add a drop since the oil change.

I had recently changed the throttle body to intake gasket to the new updated version as well. About a week prior to the oil change. It was still using oil after the new part.

I'm not really sure why this oil has fixes my issues. I bought the ML430 with 78000 mile two months ago. It was a one owner and had been serviced at a Benz dealer its whole life. Always with Mobil 1 0w40. I have the records.

I am going to ask my friend who is a Mercedes tech what he thinks of the oil. He's been a tech for 10 years and is a master certified tech.

I think I'm going to use this stuff in my range rover as well. It seems to be a better formulation. My range rover isn't to picky though.


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Super Moderator
99 ML430, 00 ML320, 05 E500 4matic Wagon
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22,138 Posts
You can use a 5w40. Just not the 229.51 spec which is for diesels onl. That is directly from MB.
Please see page 4 of the attached PDF.
oilchangekits.com sells the Total Quartz 5w40 that is spec 229.5 and will give
you the same results if you feel the viscosity change has slowed your consumption
way down.
Also the Total Quartz uses a Clas IV base stock and the Mobil is Class III making
the Total a better base stock.
 

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1987 W126 420SEL, 2006 F350 Super Crew Lariat 4x4
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225 Posts
Discussion Starter #3
This does not have that spec on the bottle. As far as I can remember.


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1987 W126 420SEL, 2006 F350 Super Crew Lariat 4x4
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225 Posts
Discussion Starter #4
I've never seen the Total brand where I live.

The only other odd brand I've seen is Moly Lube at Napa.


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2001 ML 430 , 2008 Audi S5
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82 Posts
Total brand is what used to be Elf in Europe. They changed names and the oil is highly regarded amongst diesel enthusiasts.
In general diesel oils are higher quality because they need to be able to deal with higher amounts of soot over time.

I never understood why they wouldn't be usable in petrol engines ....



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Super Moderator
99 ML430, 00 ML320, 05 E500 4matic Wagon
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22,138 Posts
I am just posting what Mercedes engineers have taken the time to update and
publish. I am not going to second guess them when it comes to oils.
I was just pointing it out. People can run whatever they want. If it has no MB spec
on the bottle then why is it in the truck at all?

A case of of the Total Quartz (6 quarts) is $42 from oilchangekits.com free shipping.
That is $7 a quart for some of the best synthetic oil out there for street cars.

It is spec 229.5, and you can't beat the price. Autohausaz sells it for $8.80/qt.
Oilchangekits.com is at $7/qt.
 

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2001 ML 430 , 2008 Audi S5
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82 Posts
oh, I wasn't criticizing, just making a side comment.

I always wondered if there was a scientific explanation of the differences and its impacts.
 

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2001 ML 430 , 2008 Audi S5
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82 Posts
wow... Lots of good reading there. And i got my answer:

Diesel oils have more ZDDP ( anti wear additive). Sounds great, but affects negatively all emissions parts ( catalytics and such).

therefore: may be slightly better for the engine, but not for the rest of the car.

Note to Self: Stick to manufacturer specifications :) :)

I have learned something today !
 

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1987 W126 420SEL, 2006 F350 Super Crew Lariat 4x4
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225 Posts
Discussion Starter #10
Properties of each kind of oil. I typically use Mobil 1 0-w40
Typical Properties

Mobil 1 0W-40 Value

Viscosity, cSt (ASTM D445)
@ 40º C 75
@ 100º C 13.5
Viscosity Index 185
MRV at -40ºC, cP (ASTM D4684) 31,000
HTHS Viscosity, mPa•s @ 150ºC, (ASTM D4683) 3.8
Total Base Number (ASTM D2896) 11.8
Sulfated Ash, wt% (ASTM D874) 1.3
Phosphorous, wt% (ASTM D4981) 0.1
Flash Point, ºC (ASTM D92) 230
Density @15.6 ºC, g/ml (ASTM D4052) 0.85

Mobil1 5w40 diesel truck engine

Mobil 1 Turbo Diesel Truck 5W-40
SAE Grade 5W-40

Viscosity, cSt (ASTM D445)
@ 40ºC 97.9
@ 100ºC 14.5
Viscosity Index 153
Phosporous (ASTM D4951) 0.11
HTHS Viscosity, mPa•s @ 150ºC (ASTM D4683) 3.8
Sulfated Ash, wt% (ASTM D874) 0.95
Total Base #, mg KOH/g (ASTM D2896) 10.7
Flash Point, ºC (ASTM D92) 215
Density @ 15.6ºC g/ml (ASTM D4052) 0.85

Not much difference in any of the critical numbers. The biggest difference is in the Total Base #and a bit less ash in the Turbo diesel formula. I'm sure its not going to hurt anything ever. Just some factual numbers instead of wild speculation without facts.
 

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'05 ML350SE
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1,395 Posts
I believe what you are using is the descendent of Mobil Delvac 1 5W-40. This oil was designed for diesel AND gas engines, both in a fleet environment. It was considered by many to be an excellent oil. I had used it in MY MY99 because of its better TBN rating and low temperature viscosity. As a precaution, I had the oil tested at the FSS change interval and the results were always the same: I could of run it longer. I think I put on over 100k miles with this oil with no problems (serviced at about 12.5k intervals).
The Mobil spec sheet for your oil indicates that it can be used for fleet gas engines as well as diesel. If you are worried about the oil, a) contact Mobil for comments and b) have it tested at oil change time.
 

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1987 W126 420SEL, 2006 F350 Super Crew Lariat 4x4
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225 Posts
Discussion Starter #12
i'm not worried. I know it'll be fine. infact, im buying two more gallons and putting it in my 2001 Range Rover 4.6L V8 this weekend.:thumbsup:
 

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2000 ML430 (Sold)
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1,209 Posts
Im running Rotella T6 5W-40 and im very very happy with it. Has a different MB spec on the bottle (228.31) but works great in diesel and gasoline engines.

Price is awesome too
 

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2009 ML320 Bluetec, 2013 Tesla Model S 85
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2002 ML270 CDI
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178 Posts
I believe what you are using is the descendent of Mobil Delvac 1 5W-40. This oil was designed for diesel AND gas engines, both in a fleet environment. It was considered by many to be an excellent oil.
Yes it was the best, but then they changed it from 228.5 to 228.51 "ESP" formula and rendered it basically useless. I bought 2 20l cubes of it back in 2008 when they were phasing out the 228.5.

I'm just finishing the last cube next oil change. Not sure what to buy next. Can't get Total oil here. Probably just go back to M1 0W-40. Or maybe get some of the ESP Delvac 1 and put a can of ZDDP Max in it lol.
 

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W124 E300 12v 1992 and a 2009 Crown Victoria
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1,044 Posts
Aren't oils with approval 229.5 for engines of ~2006 + ?

AfaIk, 229.3 is for ~99-2005.

Unless it is backward compatible?
 

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2002 ML270 CDI
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178 Posts
No they are different specs. 229.5 is for long drain intervals and if you follow ASSYST. 229.3 is the cheap arse oil for normal drain intervals or tightwads. In some MB vehicles they allow the use of either spec, as long as you follow the drain intervals accordingly.

Diesel specific oils are on the 228.5 and 228.3 sheets. But these are being slowly phased out in favour of 228.51 and 228.31 "ESP" type oils, like has happened to Delvac 1.

These "ESP" oils have very low ZDDP to try to prevent DPF systems from clogging too early. The trouble is that ZDDP is and has always been the only real oil additive available for reducing serious engine wear.

They are saying that 228.x1 is new and improved and backward compatible with 228.x. But then they would say that wouldn't they. And in the same breath they say things like don't use 228.x1 if you don't have a DPF.
 

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W124 E300 12v 1992 and a 2009 Crown Victoria
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Thank you for the reply.

Now for a really important question; are they, 229.5 and 229.3, backward compatible with 229.1? Just to lubricate in the first place, then comes the change interval in second. I've been looking for an answer for this since for ever to use them on my w124 if applicable. Oils under 229.1 in appropriate viscosity are disappearing little by little where I live.

Forgive me for going off-topic.
 
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