PeachParts Mercedes-Benz Forum - View Single Post

JHZR2 · #11 05-01-2010, 08:32 PM

Can't assume that elevated lead (flagged) is to be expected just because of the age either. Uoas need to be trended to validate that.

I don't get it - do you think I'm implying that the fuel is low quality or something?

Fuel ingress into the oil is a very common thing. One must consider the precursors to a biodiesel product, but again, it does not mean there is anything wrong with the fuel.

You verywell could have an injector that leaks after sitting down, washing past the rings and into the locality of the bearings. Given the basestock of the oil and the sump size, shrearing out of grade is not expected.

K has to be coming from somewhere, without Na likely it isn't antifreeze. The change in viscosity has to come from something, a PAO in an 8qt sump isn't going to go out of grade without an issue.

We only have so much info... Right now I'm betting upon a fuel system issue, perhaps related to a leaking injector or something not right.

What's the point of doing uoa unless you use it to try to infer potential issues or lack thereof? Your UOA wasn't spotless in multiple ways. Could mean something associated with the engine, could be the fuel, or yhe flags we see could have to do with the use of the fuel in the engine.

It's still worth it to look into the reasons why we see flags and abnormal readings...