This is for syn fuchs75W85 not the conventional 85W90
Gear oil 85w90 or 75w90 Doesn't it matter ?
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I am running Mobil1 75W90 full synthetic.
Don't confuse the specs with Viscosity.
Because of varying climates that these cars are sold in MB WILL require for certain regions a high viscosity range WHILE requiring compliance with a certain specification. Also certain regions will have different components that may/will require different viscosity ranges.
In the US the first and most important specification is the viscosity range THAT complies with the MB 235.0 and MB235.7 technical standards. Yes there are thinner fluids that comply however those fluids ARE NOT permitted for use in specific regions and specific applications.
Again in the US markets nothing thinner than 85w90 may be used that complies with MB235.0 and 235.7 standards.
Because of varying climates that these cars are sold in MB WILL require for certain regions a high viscosity range WHILE requiring compliance with a certain specification. Also certain regions will have different components that may/will require different viscosity ranges.
In the US the first and most important specification is the viscosity range THAT complies with the MB 235.0 and MB235.7 technical standards. Yes there are thinner fluids that comply however those fluids ARE NOT permitted for use in specific regions and specific applications.
Again in the US markets nothing thinner than 85w90 may be used that complies with MB235.0 and 235.7 standards.
No its for the MB spec'd 235.7 85w90. In the US 85w90 is not sold or available on the market since the majority of car makers do not require the higher viscosity fluids.
85W90 is conventional and I specifically ask for 75W85 and the answer was 55$, plus needs to be order. I do not know and did not ask how much 85W90 is. Dealer is selling Valvoline 75W90 for supplement 15$ a bottle. Star service DVD for USA states that Fuchs synthetic fluid can be used on cars produced even before 2001 (Fuchs become available in 01 and has viscosity index of 144) and you are saying that conventional oil will perform better than synthetic? Why not using conventional engine oil instead of synthetic, will be cheaper? You cannot buy Mobilube LS 85W-90 (viscosity 100) Limited-Slip Gear Lubricant anymore because is been replaced by Mobil Delvac Synthetic Gear Oil 75W90 (viscosity of 140) widely available for commercial trucks that meets MB 235.8 specs, also Lufteknic Porsche web page(http://www.lufteknic.com/Merchant2/...ode=Mobil75-90delvac&Category_Code=lubricants) and Mobil Delvac web page(http://www.mobil.com/USA-English/Lu..._Delvac_Synthetic_Gear_Oil_75W-90_80W-140.asp). The viscosity index for Mobil1 synthetic gear oil is 150. Therefore, 144 and 150 are not that far and you should agree that if the viscosity is the most important for gear oil they should provide same levels of protection. I think that all oil properties are important, for instance, 80W140 has viscosity index of 139, but cSt @100ºC is doubled and at 40ºC is 2.5 times bigger compare to 75W90.
85w90 is a synthetic...it is produced by Mobil/BP/Castrol for Mercedes List is around $30 per liter, if they cut a deal it can be had for around $26.00. This is a high end synthetic not a conventional lube which is why MB is using it on more and more applications becuase of its better protection to the differentials.
In the US we pay about 1/2 the price for lubricating fluids.
The critical operating temperature is 40C for a differential.
75w90 is does not provide sufficient protection in most MB applications.
NEVER use a 75w90 in a US Spec differential.
In the US we pay about 1/2 the price for lubricating fluids.
The critical operating temperature is 40C for a differential.
75w90 is does not provide sufficient protection in most MB applications.
NEVER use a 75w90 in a US Spec differential.
Ok, people everyone who is been following this thread: Please look all the pictures I am attaching and tell me what is wrong whit them? I want answers based on healthy thinking over those pictures posted; not just chewing same words repeatedly, because you are afraid that thinking can gets you a headache.
I do not thing that 85W90 is synthetic (check this web site Mobilube LS 85W-90), it says that: "Mobil LS 85W-90 is an extra high performance, automotive gear lubricant formulated from select base oils and an advanced additive system specifically for limited-slip differentials". It is been around for long time to be synthetic, and it is been discontinued since 75W90 Delvac Synthetic was developed. And trust me I know about oil and gas and diesel prices in EU, that is why I choose to buy W211 CDI, because I can go back if gets to S***** here. I never ask about it because my car according to first picture is calling for 75W85, am I right, and probably this is true for other member's car and especially for you drivbywire. One of your vehicles is same car like mine; correct me if I am wrong. O and by the way, our differentials are Ø210E. I do not argue about 4matic cars or SUVs may be the rear differential needs same oil, or maybe not, I can check if someone needs info. Second and third picture are info about FUCHS synthetic oil called Titan and made for MB, which I want you people to compare to forth picture representing Mobil1 Gear Oil. Now I want to know which oil has higher viscosity at 40°C, FUCHS or MOBIL1.
What the first picture said, according to drivbywire, is that MB fill up our rear differentials with oil that will fail and will cost 3000 to 3500$ in warranty repair for thousands if not hundreds of thousands cars, correct? Why I should not use 75W90 synthetic oil on car prefilled with 75W85? Kajtek1 and paulv are right: MB drop viscosity of the gear oil when they start using FUCHS synthetic, but they gain better protection compare to conventional 85W90 - THANK YOU Kajtek1 THANK YOU paulv. Now at last I want to know which car differential has working temperature of 40°C, I may spend some money to get one of those for my E.
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Your information was current back in 2002...it has since been revised (2/2007)!
Go ahead and run a differential fluid that is 30% thinner than the 85w90 which MB now calls for in 2006-2010+.
Viscosity is the key factor, the 75w90 and 75w85 is simply to thin for the differentials. The 75w90 is only called for in the G and R class differentials WITHOUT limited slip, if you have limited slip we go right back to viscosity ie 75w140!
MB has revised that recomendation to only include 85w90 as the primary viscosity range and no longer supports the thinner fluids.
The higher the 40C cSt the better the fluids performance in typical operating temperature ranges.
To quote the STLE mantra "Viscosity, Viscosity, Viscosity!"
Given that all my Mercedes are Diesel, the increased torque going thru the gear boxes is quite a bit higher than that in a gasser. I need a higher viscosity fluid to protect the gear sets and bearings (just as Mercedes recommends).
All the BS aside, I replace the differential fluid with every transmission fluid flush ever 30,000 miles.
Below are all the current supporting documents.
Go ahead and run a differential fluid that is 30% thinner than the 85w90 which MB now calls for in 2006-2010+.
Viscosity is the key factor, the 75w90 and 75w85 is simply to thin for the differentials. The 75w90 is only called for in the G and R class differentials WITHOUT limited slip, if you have limited slip we go right back to viscosity ie 75w140!
MB has revised that recomendation to only include 85w90 as the primary viscosity range and no longer supports the thinner fluids.
The higher the 40C cSt the better the fluids performance in typical operating temperature ranges.
To quote the STLE mantra "Viscosity, Viscosity, Viscosity!"
Given that all my Mercedes are Diesel, the increased torque going thru the gear boxes is quite a bit higher than that in a gasser. I need a higher viscosity fluid to protect the gear sets and bearings (just as Mercedes recommends).
All the BS aside, I replace the differential fluid with every transmission fluid flush ever 30,000 miles.
Below are all the current supporting documents.
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According to the 2010 MB Fluid application manual, which is actually from 06/05/2008 according to StarTekInfo web page (see picture below), saying 2003-2010 on the bottom not old info, attached by you drivbywire, you ML and GL with or w/o differential locks call for MB Gear Oil Part No. A001 989 33 03 10 - which is 75W85 check posted information by Noodles and also picture posted by me from Star Service, but you probably read the first page only never going further in that manual like everything else we been discussing here. Be very careful, you do not have enough protection there at low temperature with 85W90. You learn one thing and that is it 85W90, even you cannot change your mind when reading something different. In addition, no, my information is probably more recent than yours is, because the picture from Star Service DVD says ®2007 Mercedes-Benz, LLC on the bottom, but I left it out when resized it (can be PM'd upon request). In addition, why you keep changing your opinion: first, you say that 85W90 has cSt of 153, now you are presenting Mobilube HD-A which is also conventional with cSt 184, I think that you did not read the top of the page, where it says that both oils are been formulated from base oils instead of synthetic basestocks. Why do you thing that MB says that the new oil 75W85 can be used on older cars manifactured before 2001 "without reservations". My guess is that they found that it provides sufficient protection when replace 85W90 or 75W90.
All the B*** S**** aside read everything when is presented to you in easy to digest form, do not hold, on things you know, you may learn something, no one knows everything.
THE TRUTH IS BORN IN DISCUSSIONS, but constructive discussions.
I am suggesting that you go back and READ, READ AND READ MANY MORE TIMES this thread from page one, and take your time to check all pictures and links. Also read the information, which you have, completely, DO NOT CONFRONT YOURSELF.
So far, you are not being able to prove why synthetic oil should not be better than conventional even if you use MB synthetic oil recommended by them with lower viscosity than Mobil1 or Valvoline.
All the B*** S**** aside read everything when is presented to you in easy to digest form, do not hold, on things you know, you may learn something, no one knows everything.
THE TRUTH IS BORN IN DISCUSSIONS, but constructive discussions.
I am suggesting that you go back and READ, READ AND READ MANY MORE TIMES this thread from page one, and take your time to check all pictures and links. Also read the information, which you have, completely, DO NOT CONFRONT YOURSELF.
So far, you are not being able to prove why synthetic oil should not be better than conventional even if you use MB synthetic oil recommended by them with lower viscosity than Mobil1 or Valvoline.
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So what does a 1997 Supra have to do with a Mercedes Benz topic and 75w90?
The fact remains that only the viscosity range of 85w90 is approved unless otherwise stated for your model.
The MB235.7 85w90 is a synthetic oil
MB Hypoid Gear Oil (85W-90)
MB Part No. A001 989 17 03 10
If you want to trash your differential go for it.
I am simply recomending what Mercedes recomends ie 85w90 and if you had any clue as to why, it would be obvious that a 75w90 is too thin for these applications.
Would you run a 0w20 in your Mercedes engine, thats the difference in viscosity we are talking here when comparing a 75w90 to an MB235.7 85w90.
The fact remains that only the viscosity range of 85w90 is approved unless otherwise stated for your model.
The MB235.7 85w90 is a synthetic oil
MB Hypoid Gear Oil (85W-90)
MB Part No. A001 989 17 03 10
If you want to trash your differential go for it.
I am simply recomending what Mercedes recomends ie 85w90 and if you had any clue as to why, it would be obvious that a 75w90 is too thin for these applications.
Would you run a 0w20 in your Mercedes engine, thats the difference in viscosity we are talking here when comparing a 75w90 to an MB235.7 85w90.
Just an example that your differential stil will be protected if you use 75W90 synthetic or conventional, or 75W85 instead of 85W90. I think that you are trying to trash yours if you been putting 85W90 instead of 75W85. READ, READ AND READ EVERYTHIN, do not hold on yours.
Now yor are saying "unless otherwise stated for you model".AND NO IS NOT SYNTHETIC.
It depends on the model, some require a thicker fluid ie 75w140 so yes "Unless otherwise stated" because the higher performance models need a thicker fluid.
The issue again is the 85w vs the 75w and that the 75w has 1/3 to 1/2 the viscosity at 40C when comparing to the 85w under the MB235.7 fluids.
The fact is the Manual says that you are wrong, so if you choose to use the incorrect fluid thats your choice.
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The issue again is the 85w vs the 75w and that the 75w has 1/3 to 1/2 the viscosity at 40C when comparing to the 85w under the MB235.7 fluids.
The fact is the Manual says that you are wrong, so if you choose to use the incorrect fluid thats your choice.
So you are saying that Star Service Manual which covers all USA W211 models from 2003-2008 it is wrong about 75W85 oil in our differentials, that is been fill up in the factory. In addition, the oil manual you are using, mentioning same oil for your ML and GL with or without differential lock, or for G-WAGEN with differential locks is wrong.It depends on the model, some require a thicker fluid ie 75w140 so yes "Unless otherwise stated" because the higher performance models need a thicker fluid.
The issue again is the 85w vs the 75w and that the 75w has 1/3 to 1/2 the viscosity at 40C when comparing to the 85w under the MB235.7 fluids.
The fact is the Manual says that you are wrong, so if you choose to use the incorrect fluid thats your choice.
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This oil is much thinner than Mobil75W90 and is not damaging the rear end, it makes me wonder how the Mobil will not being able to provide protection.
Drivbywire, please take your time and check the pictures I am attaching and explain to me how FUCHS Titan Synthetic Gear Oil 75W85 is better than Mobil1 Synthetic Gear Oil 75W90.
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a device that is designed or used to transport people or cargo.
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OK, here it is. Just got my new original manual for my euro W126 380SE. It says 1.3L Hypoid gear oil SEA (sic?) 90, 85W90. So, I figure I should change it, since who knows when it was changed if ever on this thing. My question is: what is the allen wrench size(s) for the drain and fill plugs so I can procure them?
w211 uses 14mm.
SAE 90 can be any oil - 75W90 or 85W90 or only 90. With your location will be better if you go with 75W90, to cover low temperatures.
Here is a link to all MB fluid sheets. MB Hypoid Gear Oil (85W90), MB Part No A001 989 17 03 cannot be found on any of them. The fluid manual posted be drivbywire, dating back to 06/05/2008 says that this oil meets sheet 235.7 specifications, but it is not on that sheet either.
MB 235.7 - Universal hypoid gear oils (Specification 235.7) - Mercedes-Benz Specifications for Operating Fluids
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thank you. I just ordered a set on ebay !
Every car manufacturer out there has its own oil grease ETC.Basically saying if you don't use our recommended oil the car won't run Which i find very funny.I have always used aftermarket heavier oils on my MBZ and never had seal blow by or material shavings from poor viscosity and lubrication.Dealer said i should use w0-40 oil in my engine have you seen what happens to it when engine reaches operational temperatures.It turns in to water how do u expect engine to be properly lubricated with an oil like that.Im not saying ticker the better but if you are not living in alaska where temperatures are -50c please stay away from water like oils
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