Understanding a Blackstone oil analysis
I just had a Blackstone oil analysis completed on my 95 525I with 104,000 or so miles, about 3,600 miles on Mobil 1 0w40.
While test was positive there were a couple concerns on my part. Perhaps some of my concersn are unique to BMWS.
Lead was a 23, which are high, universal averages should be around seven. Is this bearing wear? Other bearing metals were fine.
Boron was a 127 reading and universal averages were about 60. There is no antifreeze in the oil. Could this be the high detergent level of the Mobil 1?
Fuel in the oil was a little high at about 1 percent. The test indicated that I should only be concerned if over 2 percent. Could my E.A.T chip be causing my engine to run rich? Alternatively, is it simple like my charcoal canister never been replaced in 10 years?
The TBN was 6.3. What does that really mean? While it means I have life left in the oil. How much life is left? Higher number is better as it understand it.
Thanks,
1995 525i Auto, M50TU 2.5L, EAT chip, 1/95 build, USA, 205/65/15 tires, ASC+T, HID, lumbar, EC Mirror, BMW Alpine 5 radio with BMW-Pioneer CD Changer, abt 236k miles, Oxford Green/Parchment