GC 8,155 miles, '03 BMW 325i

[F1Crazy]

I did this UOA more than year ago so it was still green stuff. The story of this sample is that it was taken from a container that previously had break-in oil in it and I'm afraid it wasn't completely clean before I dumped GC in it. This may explain higher lead but who knows

The previous analysis was done on BMW synthetic 5W-30.

 

[TooSlick]

What was the previous oil used in this engine? It looks like the Mobil 1, 0w-40 ....

The lead could be from overuse of fuel additives or even switching brands of gasoline ....

Tooslick

 

[Al]

The container didn't have anything to do with it. Its not much different than the 15% or so of used oil that stays in an engine when you put in the new oil. We are talking extremely small small dilutions in your case. I don't see that lead/iron numbers as anything to be concerned about

 

[F1Crazy]

quote:

---

Originally posted by TooSlick:
What was the previous oil used in this engine? It looks like the Mobil 1, 0w-40 ....

The lead could be from overuse of fuel additives or even switching brands of gasoline ....

Tooslick

---

The previous oil was BMW synthetic 5W-30, here's UOA:
http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=3;t=001176

 

[blupupher]

Isn't the Moly way high? GC is 0 new, so there is definitely some contamination from the old oil.