BMWs don't like to be babied, but with your ownership history I'm sure you're aware of that. Change oil brand and do another analysis at 5000 miles.

But your results have me thinking maybe I should get mine done on next change (damn, just changed oil)... poor thing sits more than I would like. Though I do drive it hard when I do get her out. Hah, mine has been getting <2500 mile oil changes for the last few years. Yes, I know I'm probably wasting money... but it helps me sleep better.

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2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)

2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)