Last free oil change at dealership so previous oil wasn't in long enough to justify a report. I did request TAN but they didn't do it. Not sure what's up with that.
I have M1 0w-40 in there now, will change it out in 7500 miles.
Old thread for last report is HERE
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Comment: We talked about the rough winter in last year's report, and Boston got slammed pretty hard again this year. Your BMW doesn't seem to mind, though. Metals were definitely higher than last time (most notably aluminum and iron, from pistons and steel parts), but some of that is just due to the longer oil run. The harsh winter may have had some effect, if the engine saw a lot of cold starts, but nothing is far enough out of line with averages to call a problem. The TBN is good at 3.7, so try 10,000 miles next, and we'll keep our fingers crossed for a milder winter this year! MAKE/MODEL: BMW 3.0L (N55) I-6 Turbo (N55) I-6 Turbo OIL BMW 5w30 M1 0w-40 M1 0w-40 BMW 5w30 MILES IN USE 7630 1993 5520 5150 MILES 50284 42653 40660 35140 SAMPLE TAKEN 3/31/2015 6/30/2014 5/1/2014 11/16/2013 ALUMINUM 19 NA 6 8 CHROMIUM 1 NA 1 1 IRON 50 NA 24 21 COPPER 6 NA 3 3 LEAD 0 NA 0 1 TIN 0 NA 0 3 MOLYBDENUM 151 NA 104 140 NICKEL 1 NA 1 0 MANGANESE 3 NA 1 1 SILVER 0 NA 0 0 TITANIUM 0 NA 0 0 POTASSIUM 14 NA 2 2 BORON 75 NA 151 61 SILICON 6 NA 4 3 SODIUM 9 NA 3 6 CALCIUM 2397 NA 3239 2321 MAGNESIUM 18 NA 19 17 PHOSPHORUS 935 NA 989 850 ZINC 1112 NA 1176 976 BARIUM 0 NA 0 0 SUS VIS 210ｺF 63.2 NA 68.5 64.4 cSt @ 212ｺF 11.12 NA 12.56 11.44 FLASHPOINT ｺF 395 NA 415 420 Fuel <0.5 NA <0.5 <0.5 Antifreeze 0 NA 0 0 WATER 0 NA 0 0 INSOLUBLES 0.3 NA 0.2 0.4 TBN 3.7 NA 5.6 5.3
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