Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > F10 / F11 (2011 - Current)

F10 / F11 (2011 - Current)
The new chapter in the highly successful story of the BMW 5 Series Sedan (F10) and wagon (F11)

Reply
 
Thread Tools Display Modes
  #1  
Old 01-30-2013, 04:45 PM
m6pwr m6pwr is offline
Officially Welcomed to the 'Fest
Location: San Diego, CA
 
Join Date: Jan 2008
Posts: 291
Mein Auto: '14 335i M Sport
BMW's Oil

For folks who do used oil analysis (uoa), or who might otherwise be interested, here is a virgin oil analysis (voa) done last week by Polaris Labs on a sample of the oil used by BMW in all their current gas models with turbo direct injection motors (including the M5 and M6): BMW High Performance Synthetic 5w30. The voa will help interpreting later uoa's if you are inclined to do those.

The bottle says the oil is made in the US with foreign and domestic components. It meets ACEA A3B3 (the Euro high temp/high rpm spec) and API SL/CF. I believe it is made by Castrol, BMW's lubricant partner, and also meets BMW's own LL01 spec.

Aluminum 2 ppm
Silicon 3
Sodium 6
Moly 143
Boron 60
Magnesium 12
Calcium 2157
Phosphorous 884
Zinc 1004

Vis. 100 C 11.7 Cst
Base number 8.16
Oxidation 6 abs/cm
Nitration 5 abs/cm

Couple of comments:

The API SL spec is interesting. It's an old spec, but sometimes older is better. I think BMW and Castrol deliberately formulated the oil to this spec in order to have the greatest flexibility in formulating the additive package. It's a pretty diverse pack with more of the anti-wear adds (phoshorous and zinc, and also boron) than you'd find in any 5w30 oil today (formulated to API SM or SN). The moly add gives good anti-friction (more slippery) performance which helps with gas mileage and also indirectly with anti-wear. The small amount of silicon is there to combat foaming which can take place at high rpms. Calcium and magnesium are detergents and antacid alkalines. The viscosity is at the high end - - almost a 40 weight. That will help as the oil shears back (thins out) with high temps/rpms. The base number is an expression of the reserve alkalinity of the oil - - the ability to neutralize acids that form in the crankcase. Many oils have high base numbers up around 11 or 12, an indication that they can neutralize a lot of acid. But the high base number also can mean a higher propensity to form deposits in the engine. The best modern oils now have lower base numbers but at the same time better alkaline adds that don't deplete so fast. So a base number of 8 is a good sign.

The oxidation/nitration numbers in an oil normally indicate the oil is wearing out, but in a unused or virgin sample it can be a good sign. The test equipment can be fooled by esters in the oil and interpreted as oxidation/nitration. Esters in the base stock are good - - gives the oil good high temp stability. In interpreting a uoa, you would want to subtract these numbers from the oxidation/nitration numbers to get a more accurate idea of the remaining serviceability of the oil.

Finally, here's a description of what an oil must go through for a mfr to get a "license" that says the oil is approved by BMW to meet their LL01 spec -
http://www.top1oil.com/USA/newsletter/2011/July.pdf. As you can see it's a pretty rigorous set of tests.

Overall, I think BMW's oil is pretty darn stout - - top tier, really.
Reply With Quote
Advertisement
  #2  
Old 01-31-2013, 04:26 PM
FreqMan FreqMan is offline
Registered User
Location: Alexandria, VA
 
Join Date: Apr 2012
Posts: 66
Mein Auto: Alexandria, VA
Thanks for the great write-up!
__________________
2014 328d

2013 Porsche Cayenne
Reply With Quote
  #3  
Old 02-02-2013, 09:39 PM
ritzy996tt ritzy996tt is offline
Registered User
Location: New York
 
Join Date: Jun 2007
Posts: 3
Mein Auto: Bmw 323i,Bmw M3,996Turbo
Great information! Never really knew what was in my oil
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > F10 / F11 (2011 - Current)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



Forum Jump


All times are GMT -7. The time now is 01:47 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms