On my new to me 2004 X5 at 130,628 miles I replaced the MT gear oil with Red Line 75W-90 MT90 GL-4. I have no way of knowing though I have a feeling the oil was the factory fill. The first to second shift was not real smooth most of the time. Seems to shift better now. After a few thousand miles now I always start in second gear. First is way to low. Nice though if you are going from a stop up a steep hill.

The Blackstone analysis is below.

BRAD: Universal averages show typical wear levels for a BMW manual transmission after about 27,900 miles on the oil. We're not sure what's aluminum, but it really shouldn't be the dominant wear metal and certainly shouldn't be this high. Iron is from steel parts and copper shows brass/bronze wear. If this is factory oil the combination of wear-in and a long oil run might explain some of the metal, but we're not sure about all of it. Silicon is probably sealer or oil additive, but could show dirt contamination too. Is it shifting okay? Check back in 10,000-15,000 miles.

Aluminium was 192 where the average is 32
Iron was 178 where the average is 53
Copper was 81 where the average is 34

Many of the other categories were below or way below average.

I also replaced the drain and fill plugs at that time.

Brad

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Bradb
2004 E53 X5 3.0 6MT Sport
Toledo Blue Metallic over black
born 2-12-04 LB09220
Picked up 7-2-18 from Ziggy
BMWCCA 485746
2002 E39 525i 5MT sport Jet black / black
2002 E39 M5 6MT Carbon black / black sport
2003 E39 530i 5MT sport Stahlblau metallic
2004 E46 325ic 5MT sport triple black
2008 E60 M5 SMG Space gray / black
2015 F85 X5M Carbon black / black