The 75w-85/90 will work as well. I looked it up and I used 75w-90 redline full synth in my diffs without issue. I corrected above. I have a bottle left from my former x5. I changed the fluids on my x5 4.8, but not on my m. M has only 48k miles and I’ll replace the diff, xfer and transmission fluid around 60k.
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