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Old 02-01-2015, 02:48 PM
mechauto mechauto is offline
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Location: Minnesota
 
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Mein Auto: 2008 550i Sport
Question Regarding Differential Oil

I just purchased some differential oil for my e60 550 and this is what I received...
I researched this part number and everything I found references it for use in BMW motorcycles. Does anyone know if this is the same as the Castrol SAF-XO BMW part number 33117695240? The website I purchased it from (ECS) says that p/n 07512293972 supersedes the Castrol 33117695240 but I cannot find any BMW documentation to support this. Just want to be sure before I put this in. Thanks much for any help.
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Last edited by mechauto; 02-01-2015 at 06:16 PM.
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  #2  
Old 02-01-2015, 04:40 PM
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R ODonnell R ODonnell is offline
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Location: USA
 
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Mein Auto: 2009 BMW X3
Unless your car calls for heavier gear oil you're good to go. I run the exact same stuff but from Redline in both front and rear diff's.

http://www.redlineoil.com/product.aspx?product=57904
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Old 02-02-2015, 09:54 AM
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ECSTuning ECSTuning is offline
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Both part numbers are for the Castrol SAF-XO fluid, which is the correct fluid for your E60s non LSD rear differential. We've been receiving two bottle styles for this fluid recently, the one photographed on the site as well as the on in the first post, same fluid different packages.

Please let me know if there is anything I can do for you or if you need any assistance,

-James
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Old 02-02-2015, 04:50 PM
mechauto mechauto is offline
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Location: Minnesota
 
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I was hoping for a bmw cross reference on the numbers. I just don't want to compromise my warranty if anyone questions why I put non-spec fluid in there. I guess I'll just use the argument that the bottle says "SAF-XO" and that is what my car specs. Maybe I'm just being paranoid here.
If anyone can find a document that cross references the two part #s I will send you $100....tomorrow
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