With 52000 miles on 06 cummins 5. 9 I keep getting high iron levels in my blackstone oil reports. the last sample was valvoline premuim blue 15-40 oil with 5800 miles on it. iron level was 50ppm, and the only "flagged" level. I have run amsoil, rotella, and now valvoline. valvoline having the best report so far. I had high iron, copper, and potasium with the other oils, but those levels are now exceptable with the premium blue. Now i only have the high iron. . any ideas?
i was thinking of installing a bypass filter, suggestions?
i was thinking of installing a bypass filter, suggestions?