So I finally got to doing a UOA on my N54. For those who know me I have driven the snot out of my 535i for the last 80k miles and I always run a high E85 fuel blend, approx E45 mix. Due to this I also stay on top of the vehicle maintenance and don't skimp on the materials. Here is the specifics on this UOA: Motul Xcess 5w/40, 10,050 mile on this interval, 107,800 miles on the ODO, and a E45 fuel blend is constantly ran.

As you can see Motul Xcess 8100 is some good oil.

 

Well ,, good proof , you get what you paid for with Motul ,, that's for sure .

 

Have you been using the motul for the full life of the engine, or is this for only the last 10,550 miles on Motul?

 

I only switched to Motul this last oil change. Prior to this it has been the BMW branded 5w/30 castrol oil changed every 8k miles. This interval of 10k miles was a little longer then what I normally do.

 

I expect that if you had done the same analysis after using the BMW 5W30 oil, you would have had very similar results, which are very average for a good synthetic. The analysis of the oil is to give you an idea of the health of the engine, not the oil.

Salut, Bob P.