1993 MB 400E, Liqui Moly Leichtlauf HT 5W40, 7,250 OCI

[vivaUkraine]

Oil is 12 months old with 7,250 miles on it. Super majority of these miles accumulated over spring and summer of 2019. Not very many short trips. 99%+ of trips oil reaches operating tempMostly suburban traffic at 45-55 mph. About 1,500 mi of road trips. Brutal high humidity 90F northern Virginia climate.

I did use about 7-8 bottles of various fuel system cleaners over the course (techron, gumout, bg44, etc)

Zero oil added, oil level stayed the same. Lots of daily WOT

 

[tundraotto]

That TBN is pretty spent up!

 

[vivaUkraine]

Forgot to add, car has 117,000 miles on the odometer

Here's the analysis of the Virgin oil. From exact same my container as the car's fill

 

[njohnson]

Virgin oil has 2 ppm of moly? Where is the moly coming from in the UOA?

 

[vivaUkraine]

Originally Posted by njohnson
Virgin oil has 2 ppm of moly? Where is the moly coming from in the UOA?


I'm wondering the same: where do moly and boron come from of they are not present in Virgin oil?

Why did TBN dropped from 9.8 to 1.7 in 7,250 miles?

What does "Trace amounts" for fuel and insolubles mean if they should be in %?