The oil in this report is Amsoil EFM full-SAPS 5w-40. Filter was a Mahle OX143D cartridge.
First thing that jumps out is the lead spike that I thought was resolved is back and bigger than ever. Other than that, wear metals, viscosity and TBN look OK.
For reference, the oils in the earlier reports are as follows:
03-12-15 HDD 5w-30
11-01-14 Rotella T6
07-20-14 Rotella T6 (beginning of first Pb spike)
03-09-14 HDD 5w-30
10-06-13 Rotella T6
So the high Pb first appeared in two back to back runs of Rotella T6, decreased to 3 ppm in the last interval of HDD 5w-30 and is back in this run of EFM 5w-40.
I'm going to take Blackstone's advice and do a short 8k interval on the current oil. I understand Pb is trending in the wrong direction and is elevated above average values, but how significant/critical is 19 ppm? Comments/suggestions are welcome.