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      02-21-2017, 08:00 PM   #5
0w40X1
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Drives: 2014 BMW X1 s28i M Sport
Join Date: Sep 2013
Location: West Texas

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I drained it early to get any fine wear in metal out like I saw in my Japanese car.

I had no visible metal in my diff, and I sent off the first factory oil sample of 5k miles, and the analysis showed no metals in it.

Mostly the diff drain was to find information of how clean the oil was.

Diff can be ruined way before massive metal shavings show up (the bearings).
Appreciate 0