Not sure where the Potassium was coming from but it is gone now. I went ahead and changed the oil filter housing gasket anyways
just in case which is a common cause but that must have been fine. Switched to Castrol 0w-40 this time around due to reformulated
M1 0w-40 losing the LL-01 cert. I was really liking the M1 0w-40 but I need more evidence that the new stuff can hold up before I
use it.
Link to previous post HERE
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Potassium was on our watch list in the last few samples, but it's nice and low this time around, so we're not too concerned about any ongoing coolant issue for this engine. We're not sure where the potassium came from, but if it was a little coolant, it certainly didn't seem to cause any trouble. This sample's wear metals levels look fine, and no contamination turned up in the oil. The TBN's still goo MAKE/MODEL: BMW 3.0L (N55) I-6 Turbo OIL M1 0w-40 M1 0w-40 BMW 5w30 M1 0w-40 BMW 5w30 MILES IN USE 6111 6000 7630 5520 5150 MILES 62394 56283 50284 40660 35140 SAMPLE TAKEN 7/9/2016 10/12/2015 3/31/2015 5/1/2014 11/16/2013 ALUMINUM 5 8 19 6 8 CHROMIUM 1 1 1 1 1 IRON 27 30 50 24 21 COPPER 3 4 6 3 3 LEAD 0 0 0 0 1 TIN 1 2 0 0 3 MOLYBDENUM 80 102 151 104 140 NICKEL 0 1 1 1 0 MANGANESE 1 2 3 1 1 SILVER 0 1 0 0 0 TITANIUM 0 0 0 0 0 POTASSIUM 6 16 14 2 2 BORON 135 136 75 151 61 SILICON 4 4 6 4 3 SODIUM 5 7 9 3 6 CALCIUM 2865 3068 2397 3239 2321 MAGNESIUM 19 21 18 19 17 PHOSPHORUS 901 898 935 989 850 ZINC 1054 1150 1112 1176 976 BARIUM 0 0 0 0 0 SUS VIS 210ｺF 69.2 70.2 63.2 68.5 64.4 cSt @ 212ｺF 12.75 13.01 11.12 12.56 11.44 FLASHPOINT ｺF 400 390 395 415 420 Fuel <0.5 <0.5 <0.5 <0.5 <0.5 Antifreeze 0 ? 0 0 0 WATER 0 0 0 0 0 INSOLUBLES 0.2 0.2 0.3 0.2 0.4 TBN 4.2 5.6 3.7 5.6 5.3
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@89Rustang... do you know what the Universal Averages were and at what interval?
