the royal purple and beating a dead horse
MBWorld Fanatic!
Joined: Jul 2007
Posts: 1,490
Likes: 5
From: Dallas, Texas
W203 C55 and SAAB 9-3 2.0T
heres my thanksgiving gift to all you mobil 1 fans! click on the oil link search mobil 1 click on 0-40 and it adjusts the cost to 3.99$ per qt! max 12 qts. then click store pickup hit local store for you and pay by paypal. print the receipt and take it to your local store for pickup!! ez peazy!!
http://shop.advanceautoparts.com/web...197-_-10711125
saabotuer advance auto and autozone have the 75/90 mobil 1 gear oil. have them ship it to you
http://shop.advanceautoparts.com/web...197-_-10711125
saabotuer advance auto and autozone have the 75/90 mobil 1 gear oil. have them ship it to you
MBWorld Fanatic!
Joined: Apr 2005
Posts: 3,784
Likes: 84
From: SCV SoCal
2002 CLK430
When designing an engine, Mercedes-Benz powertrain engineers choose bearing clearances. Those clearances aren't selected based on whatever plastigage they have laying around, it's based on oil thickness at operating temperature (100C).
Some may not know it, but the thickness of moving oil is measured in hundredths of a Stoke or cS (or cSt, depending on the manual). It's the manner in which viscosity is measured. Rather than saying "this oil" is more viscous than another, cS quantifies it.
I use Mobil1 0-40 because I don’t know the cS rating of every motor oil out there. What's the cS rating of [fill in the brand] at 100C? How about 40C? 0? How do I "know" if any brand that doesn’t meet MB spec will properly lubricate my engine during cold starts? Even if I knew all the specs "today", will some other brand keep me informed by producing data sheets when they make changes to the formula? (This is aside from the fact that many brand-x manufacturers don't produce data sheets for the public) On the other hand, Mercedes-Benz WILL tell me when I need to use something other than their "current" recommended oils.
There's a lot more to oil than just lubricating parts. Those same parts must be cooled and it's not done by the water jackets in the block. Bearings never see water. They're cooled by oil. I have no idea what the heat transfer rates are for any oil on the market. I do know that "if" the oil in my sump doesn't do the job, my bulletproof M113 bottom end will be reduced to scrap. The same is true for valve guides, cams, pistons (they'll overheat if the oil is too thick for the squirters), etc. In a nutshell, I use the recommended oil because I trust the powertrain engineers at Mercedes-Benz.
MBWorld Fanatic!
Joined: Sep 2008
Posts: 3,152
Likes: 0
From: murfreesboro,tn
2003 porsche 996 turbo
marcusf thats a great post! i never cease to be amazed at the level of knowledge someone can find on these forums. i have always used mobil1 mainly because m/b wants me to. now i know a small part of the reasoning behind it. makes me feel better when i cant find the sales and have to shell out 7.49 a qt!
Last edited by 320 dreamer; Nov 26, 2010 at 08:54 AM.
MBWorld Fanatic!
Joined: Mar 2010
Posts: 5,890
Likes: 323
From: Land of mountains, cheese, chocolate and watches
12' W204 C63 AMG coupe "T-Rex", 12' W451 Smart Fortwo Pulse (99' W202 C43 AMG + Ultima Can-Am sold)
Regarding motor oil, I could write an awful lot, but I’ll try to keep it short.
When designing an engine, Mercedes-Benz powertrain engineers choose bearing clearances. Those clearances aren't selected based on whatever plastigage they have laying around, it's based on oil thickness at operating temperature (100C).
Some may not know it, but the thickness of moving oil is measured in hundredths of a Stoke or cS (or cSt, depending on the manual). It's the manner in which viscosity is measured. Rather than saying "this oil" is more viscous than another, cS quantifies it.
I use Mobil1 0-40 because I don’t know the cS rating of every motor oil out there. What's the cS rating of [fill in the brand] at 100C? How about 40C? 0? How do I "know" if any brand that doesn’t meet MB spec will properly lubricate my engine during cold starts? Even if I knew all the specs "today", will some other brand keep me informed by producing data sheets when they make changes to the formula? (This is aside from the fact that many brand-x manufacturers don't produce data sheets for the public) On the other hand, Mercedes-Benz WILL tell me when I need to use something other than their "current" recommended oils.
There's a lot more to oil than just lubricating parts. Those same parts must be cooled and it's not done by the water jackets in the block. Bearings never see water. They're cooled by oil. I have no idea what the heat transfer rates are for any oil on the market. I do know that "if" the oil in my sump doesn't do the job, my bulletproof M113 bottom end will be reduced to scrap. The same is true for valve guides, cams, pistons (they'll overheat if the oil is too thick for the squirters), etc. In a nutshell, I use the recommended oil because I trust the powertrain engineers at Mercedes-Benz.
When designing an engine, Mercedes-Benz powertrain engineers choose bearing clearances. Those clearances aren't selected based on whatever plastigage they have laying around, it's based on oil thickness at operating temperature (100C).
Some may not know it, but the thickness of moving oil is measured in hundredths of a Stoke or cS (or cSt, depending on the manual). It's the manner in which viscosity is measured. Rather than saying "this oil" is more viscous than another, cS quantifies it.
I use Mobil1 0-40 because I don’t know the cS rating of every motor oil out there. What's the cS rating of [fill in the brand] at 100C? How about 40C? 0? How do I "know" if any brand that doesn’t meet MB spec will properly lubricate my engine during cold starts? Even if I knew all the specs "today", will some other brand keep me informed by producing data sheets when they make changes to the formula? (This is aside from the fact that many brand-x manufacturers don't produce data sheets for the public) On the other hand, Mercedes-Benz WILL tell me when I need to use something other than their "current" recommended oils.
There's a lot more to oil than just lubricating parts. Those same parts must be cooled and it's not done by the water jackets in the block. Bearings never see water. They're cooled by oil. I have no idea what the heat transfer rates are for any oil on the market. I do know that "if" the oil in my sump doesn't do the job, my bulletproof M113 bottom end will be reduced to scrap. The same is true for valve guides, cams, pistons (they'll overheat if the oil is too thick for the squirters), etc. In a nutshell, I use the recommended oil because I trust the powertrain engineers at Mercedes-Benz.
