So i've have my MY14 x5 35d since 60k miles and 2 yrs (84k miles as for now), assuming (was leased until 50k 5yr service expired) that oil changes was done by dealer (every so 9k-10k miles carfax shows serviced done by BMW). Since ownership the first 2 oil change was M1 ESP 5w-30 for 8.5k mi/8mo until BMW LL-04 was dropped from M1. Then it was Motul X-clean 5w40 for 7k mi/9mo, i've just changed my oil over to Liqui-Moly Top-Tec 4100 5w-40 about 1 month ago @83k miles
However my last 2 oil changes is when i started sending UOA, the first UOA was with M1 ESP 5w-30 ran it for 8.5k miles/7months , then followed by Motul x-clean for 7k mi/8mo , both showed nickel at 5 ppm and has not changed even reducing oil mileage, Iron did improved however, I'm curious into why nickel is slightly elevated. I've attached UOA from Blackstone.
However my last 2 oil changes is when i started sending UOA, the first UOA was with M1 ESP 5w-30 ran it for 8.5k miles/7months , then followed by Motul x-clean for 7k mi/8mo , both showed nickel at 5 ppm and has not changed even reducing oil mileage, Iron did improved however, I'm curious into why nickel is slightly elevated. I've attached UOA from Blackstone.