First Blackstone Oil Analysis of German Castrol @ 7680 miles with 6000 miles on the oil. Looks like some break-in metals are still shown in the oil. While TBN was still acceptable, it appears that this oil may not go the full BMW 15K mile OCI. I was encouraged that the flash point was still very high, and Fuel % was very low indicating no fuel dilution issues in this sample (a commonly reported problem with this engine). I think the GC is doing pretty well.
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COMMENTS -------- Don't be alarmed by all the highlighted numbers in the first sample from your BMW. It takes a few oil changes for all of the excess wear metals (due to new parts breaking-in) to wash from an engine. Silicon is from sand-casted parts and sealers used when assembling your engine and it too, with subsequent oil changes, should read a bit lower. Universal averages for the 3.0L are based on an oil run of ~5,500 miles. The TBN read 4.1, which shows that plenty of active additive was left in this fill. 1.0 is too low for extended use. Try running 7,000 miles next time. MI/HR on Oil: 6010 MI/HR on Unit: 7680 Sample Date: 04/10/2009 Make Up Oil Added: 0 qts ELEMENT READING UNIVERSAL AVG ---------- ------- ------------- ALUMINUM 6 4 CHROMIUM 1 0 IRON 30 12 COPPER 20 10 LEAD 2 4 TIN 0 1 MOLYBDENUM 28 102 NICKEL 1 0 MANGANESE 8 2 SILVER 0 0 TITANIUM 0 0 POTASSIUM 4 2 BORON 9 62 SILICON 8 4 SODIUM 7 6 CALCIUM 2009 2353 MAGNESIUM 438 63 PHOSPHORUS 803 792 ZINC 990 961 BARIUM 1 0 ----- PROPERTY ------ VALUE SHOULD BE SUS Viscosity @ 210F: 60.7 58-65 cSt Viscosity @ 100C: 10.41 9.6-11.9 Flashpoint (F): 375 >365 Fuel %: <0.5 <2 Antifreeze %: 0.0 0.0 Water %: 0.0 0.0 Insolubles %: 0.4 <0.6 TBN: 4.1