06 Cummins 5.9 7350mi Rotella 15w-40

[Gary Allan]

This is my neighbors Cummins. His first UOA. B-S flagged the Potassium. This appears very like another Cummins UOA posted here. http://theoildrop.server101.com/forums/s...ge=0#Post867667

Naturally, this has him married to UOA for the reat of his ownership

The unit sees mixed service.
Mileage on oil:7347
Mileage on unit: 33,821
Filter: Wix/Napa Gold
No make up
No additives to oil or fuel
This UOA/UA

Al: 7/3
Ch: 2/2
Fe: 36/23
Cu: 4/4
Pb: 4/2
Tin:1/1
Pot:17/2
Bor:3/88
Si: 4/7
Na: 3/4
Calc:2981/2863
Mag: 9/241
Phos: 1201/1086
Zinc: 1351/1263
Everything else zero
Visc: 76.6
FP: 415
Fuel: AF:?
H20: 0
Insol: .3

Your thoughts?

 

[jmac]

Potassium is a little high, but not shockingly high. What kind of coolant is he using? Suggest continue to monitor or next sample use Terry's services with additional TAN, oxidation, etc tests.

 

[Gary Allan]

He's still under DC warranty with the OEM coolant fill. I will attempt to upgrade him to Terry's level of service. This is his first UOA on any vehicle ..so this is his first time to the rodeo. It appears, even without TBN/etc. that this oil held up well. The flash point is stellar. Fe appears elevated, but I have no basis for the UA in terms of mileage to index it.

 

[Gary Allan]

FYI, Kristen informed me that this UOA's UA was based on 6700 mile averages.