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2000 Lexus RX300 , 2002 Mercedes ML320 , 2006 ACURA MDX , 2006 Mercedes E-350
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19 Posts
Discussion Starter · #1 ·
Hi
I will change the gear oil very soon.
But my question is
Mobil1 doesn't have 85w90. They have 75w90 and 75w140.
Can i use 75w90 ?
Any comment ?
Thank you

Regards
jun

2006 E-350 Base model
 

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Super Moderator
99 ML430, 00 ML320, 05 E500 4matic Wagon
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23,068 Posts
I just got the 85w90 at the dealer. I was not about to skimp on a $900 differential.
Some dealers have the 75w85 and MB had a release that it can be used and increase
fuel efficiency. I stuck with the 85w90 because I have a 4matic and I really doubt the
mileage increase would be all that significant on a 4matic.

It has been debated here before, but the shear strength of the wrong viscosity will shorten
the lifespan of a diff.
 

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1922 Ford T no OBD, no ECU, no SCN
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37,844 Posts
There is lot of myths about oils. The viscosity is not parallel with mentioned shear strength.
Than in the case of motor oils, the low cold viscosity actually helps to protect the engine by starting the lubrication on cold start up much faster than the heavy oil, that keeps engine running with no oil pressure for long time.
If the lower viscosity oil is MB approved - I would use it unless I would live in Mojave, or similar location.
New oils, especially synthetics give much better protection, than the old oils even if you drop few points on viscosity level.
 

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Super Moderator
99 ML430, 00 ML320, 05 E500 4matic Wagon
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23,068 Posts
The only approved gear oil I know that is below 80w90 weight for the W211 rear diff is
the MB 75w85 PN 001989330312.

I am not saying others won't work, but I am sticking to the book on fluid specs for our MBs.
 

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Banned
2006 E320 CDI
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932 Posts
Hi
I will change the gear oil very soon.
But my question is
Mobil1 doesn't have 85w90. They have 75w90 and 75w140.
Can i use 75w90 ?
Any comment ?
Thank you

Regards
jun

2006 E-350 Base model
Yes, you can use Mobil1 75W90, in fact will give you mor protection at working temp, because your W211 has factory installed 75W85. See attachment!!!
 

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Super Moderator
99 ML430, 00 ML320, 05 E500 4matic Wagon
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23,068 Posts
I would pony up for the MB 75w85. The Mobil 1 does not have an MB spec.
You will make the money back on better fuel mileage being that is an 85 and not 90 weight oil.
Part #001 989 3303 12
 

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Banned
2006 E320 CDI
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932 Posts
I would pony up for the MB 75w85. The Mobil 1 does not have an MB spec.
You will make the money back on better fuel mileage being that is an 85 and not 90 weight oil.
Part #001 989 3303 12
If MB uses 75W85 or 85W90, I think that using Mobil 75W90 covers both MB products. May be Mobil1 Gear Oil is not approved for now by MB, but will be in a future. Every time when I open the hood, I see label "MB APPROVES MOBIL1". Mobil1 engine and transmission oils are been approved for long by MB and it is going to be a matter of time that gear oil label to say, "Meets MB 235.7 Spec". By the way, some other company make MB's oils for them, which they sell to people not thinking enough and willing to pay extra for MB brand oil or grease. Every car manufacturing company does this, they will tell you that you have to use their products otherwise you may have problems - it is about profit. Why MB does not make cars like the ones from 70 and early 80, because once you buy they do not see you except for oils and tires, if you go back to them. That is why over 75% of the cabs in Germany were MB E class, not anymore since the stupid merge w/Chrysler group may be in the future this will change again. My dad was a truck driver. He was saying that MB trucks are like a mule - they keep on going with less maintenance forever and you still can see many of old ones from 50 to late 70 running in Africa and Asia. Even the new ones are that way, but not the cars. Why do you thing they change engine oil on those trucks every 90 000 - 100 000 miles (not kidding look the attachment), but on the cars is 10 000 miles - PROFIT, that is why. MB cat is not average JOE's car that why they expect most of the owners to go back and make profit from them, but if you buy truck for business is a different story, and they want you to be happy, otherwise you will buy something else next time. Statistically 90% of the people who own MB go and buy MB next time again, because MB is a name associated with prestige and you want to keep the image you build.
At the end, it is your money and you spend them the way you want. Do not say to someone "do not use this oil, or go and dump the oil which you just putt, because the label does not say "APPROVED BY MB". Look at the facts, thing and then make decision, INFORMED DECISION, as we say in the medical field. Gave the people something that they can see, do not just say MB approval# or part# then they can chose what to do. Those forums are to help people when they have problems, or want to know something in advance, instead I see too much TALK w/o saying anything. I PM to couple of members asking something and guess, they never answer. I think that they run in some problems that I try to avoid asking upfront, but they will not share.
:surrender:
 

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Super Moderator
99 ML430, 00 ML320, 05 E500 4matic Wagon
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I know MB has their fluids re-branded. I also get them at wholesale so I understand people trying
to save money. I believe Wolfgang's ML page had the same test/list.
There was a test posted at the ML Outpost about shear strength under heat and load and
the Mobil 1 75w90 did not pass the test. Maybe the new stuff is better, but IMO the risk
is not worth it.
 

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2006 E320 CDI, 2009 ML320 Bluetec, 2009 GL320 Bluetec
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1,476 Posts
Mobil 1 75w90 FAILS the requirements of the MB differential.

The 75w90 70% thinner and does not meet the minimum requirements for the differentials.

Synthetic Mobil 1 Differential fluids:
75w90 = 106 cSt
80w90 = 136 cSt
85w90 = 153 cSt

NEVER use a 75w90 when 85w90 is called for.
 

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99 ML430, 00 ML320, 05 E500 4matic Wagon
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Thanks DB, I was going to search for those numbers you have posted many times before.
It just is not worth trying to save a few dollars on the fluid that can ruin a $900 part.
 

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Banned
2006 E320 CDI
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932 Posts
Mobil 1 75w90 FAILS the requirements of the MB differential.

The 75w90 70% thinner and does not meet the minimum requirements for the differentials.

Synthetic Mobil 1 Differential fluids:
75w90 = 106 cSt
80w90 = 136 cSt
85w90 = 153 cSt

NEVER use a 75w90 when 85w90 is called for.
Since 2001 all E class cars are factory fill w/75W85, no one calls for 80W90 even MB states that 75W85 can be used on previous models which call for 80W90 or 85W90, look at the attachment:confused: (tired of posting same things).
 

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Super Moderator
99 ML430, 00 ML320, 05 E500 4matic Wagon
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My owner's manual calls for the 85w90. Is that because it is a 4matic?

Also I am aware of the 75w85 and agree that the MB fluid made for them by Fuchs is what
has been referred to in a MB service DTB. However I won't pit the the Mobil 1 in 75w90
in for reasons already listed and the warranty I have.
 

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Banned
2006 E320 CDI
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932 Posts
85W90 for the transfer case.
Fuchs oil has lower cSt at 40°C DIN 51562-1 81.5 mm²/s and Mobil has 106 at same temperature. Mobil Delvac Synthetic Gear Oil has MB 235.8 approval with cSt at 40°C of 120, so Mobil1 Synthetic Gear Oil, which differs slightly, and stay between Delvac and Fuchs would meet MB requirements for gear oils 235.7.:dunno::dunno:
 

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2006 E320 CDI, 2009 ML320 Bluetec, 2009 GL320 Bluetec
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1,476 Posts
MB does not permit the use of anything less than 85w90 for US Spec cars.
(I hate repeating myself)

Straight from the US Spec manuals...

Rear differential:
1.06 US qt (1.0 l) Hypoid gear oil SAE 85 W 90
E 350
E 350 4MATIC
E 320 CDI
E 500
E 500 4MATIC
E 55 AMG*
*(MB Hypoid Gear Oil (85W-90)
MB Part No. A001 989 28 03 10)

Front Differential:
0.63 US qt (0.6 l) Hypoid gear oil SAE 85 W 90
E 350 4MATIC
E 500 4MATIC

Transfer Case:
0.62 US qt (0.585 l) MB Transfer Case Fluid
E 350 4MATIC
E 500 4MATIC

And wait they get thicker yet!
Hypoid Gear Oil
SL65 AMG (all model variants)
E63, SL55 AMG, CLS55 AMG, and CLS63
AMG equipped with AMG Performance
Package only
For rear axle differentials
Castrol SAF-XJ (75W-140)
 

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Banned
2006 E320 CDI
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932 Posts
MB does not permit the use of anything less than 85w90 for US Spec cars.
(I hate repeating myself)

Straight from the US Spec manuals...

Rear differential:
1.06 US qt (1.0 l) Hypoid gear oil SAE 85 W 90
E 350
E 350 4MATIC
E 320 CDI
E 500
E 500 4MATIC
E 55 AMG*
*(MB Hypoid Gear Oil (85W-90)
MB Part No. A001 989 28 03 10)

Front Differential:
0.63 US qt (0.6 l) Hypoid gear oil SAE 85 W 90
E 350 4MATIC
E 500 4MATIC

Transfer Case:
0.62 US qt (0.585 l) MB Transfer Case Fluid
E 350 4MATIC
E 500 4MATIC

And wait they get thicker yet!
Hypoid Gear Oil
SL65 AMG (all model variants)
E63, SL55 AMG, CLS55 AMG, and CLS63
AMG equipped with AMG Performance
Package only
For rear axle differentials
Castrol SAF-XJ (75W-140)
This is a b*** s**** my CDI diff takes 1.3L and it is based on the gear diameter if you do not know some are 2.62 ratio some are 3.07. in addition, I hate to repeat myself too. Some people are like donkey on wire bridge, they read something once and that is, not going any further. One of the images I posted is from Star Service DVD for W211. I will repost again, just take you time to look the attachment before start your reply. In addition, it says that all cars are factory-prefilled w/75W85 synthetic oil. I just came back from MB Service department. I ask them if I can buy FUCHS differential oil (75W85) and they ask me for what car is it. Guy check and told me that needs to be order (55$ for a bottle). Hi also offer me Valvoline SYN power full synthetic oil (75W90) 14.95$ what they are using for fill ups or topping. After this I talk to the Service Department Manager about the oil viscosity and he say that any synthetic oil that meets meet API service MT-1/GL-5 EP requirements, can be used if viscosity ranges are been meet.
 

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Super Moderator
99 ML430, 00 ML320, 05 E500 4matic Wagon
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I recently did the fluid on my transfer case and it was an ATF type fluid that was tinted
a light brown in color. MB part # 001 989 23 03 10. It is the only fluid the dealers are
putting in the W211 gasssers. It can be purchased in 1 or 5 liter bottles. No gear lube
is supposed to go in the transfer cases.
On the ML 430 the transfer case uses approved Mercon III ATF and in that I did use Mobil 1.
 

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Super Moderator
99 ML430, 00 ML320, 05 E500 4matic Wagon
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23,068 Posts
Wow, that is a pricey dealer. Mine listed it of $27.13 and sold it to me for $23, but the
good news is you got some great fluid to keep the diff happy for years.
 
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