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Hi,

I'm going to change rear differential oil on my BMW F11 535xd.

Will Redline 75W85 GL-5 Gear Oil be ok? Such as https://www.ebay.com/itm/181968651033?ul_noapp=true.

Will it replace the overpriced original BMW Hypoid Axle Oil G1 Part# 83222295532?

And does anyone know how much I need for a X-Drive differential? Is 1L enough?
I looked into all this once. I thought the "special" stuff was for the front and the rear just used GL5 (though they'd like to sell you "special" stuff there too. I looked it up again in realOEM:

For my 4/2011 manufactured 535xi, RealOEM shows 83222365987 for the rear diff and three options for the front:



I guess my memory was reversed.

I've tried asking in forums - what changed in 07/2011 that changes all the lubricants? I don't believe the part numbers changed at all.

SAF-XO is any old GL-5 75W90. Agree with the above - DO NOT put a GL-5 into a GL-4 application. GL-5 can damage/dissolve brass, for instance, so the GL-4 specification (where present) will be for a reason.
 

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