Oil Sample Results and Dealer questions.

[Cummins12V98]

They said their comparisons are on results of around 7,000 miles.

AMZ/OIL OE 15-40 ran 15K changed at 30K on my Sons 3500 SRW, he tows a 14K dump quite often.

 

[Cummins12V98]

Not sure what the problem is with the pics loading crooked????? ^^^^^^^^

 

[gsbrockman]

Not sure what the problem is with the pics loading crooked????? ^^^^^^^^

Looks like it should on my end

 

[Cummins12V98]

Thanks, still has top to left when viewing for me. Thanks for letting me know!

 

[Ram4Sam]

My view is 1/4 turn off.......right side of page is on top......

Sam

 

[Freidhof]

I did a resample and am waiting for the results, but by comparing my numbers to yours, My potassium is way high with very similar miles (30,250) on the truck. The trace of water has me slightly nervous.

EGR cooler, maybe? I haven't noticed any antifreeze loss, or milky antifreeze in the overfull bottle. I cant find the email from the dealer with the allowable specs from Cummins, but I do remember that
Cummins allowance for Potassium was quite high, its the water that really bothers me.

 

[Killer223]

Synthetic or Conventional?

So...which oil to choose? We get asked this question hundreds of times a year on the

phone, in e-mails, and written on oil slips. And honestly, from a wear standpoint, we don’t

find a lot of difference between conventional and synthetic oils. Some engines may run

better on one than the other, or maybe you find that your engine uses less oil on one or

the other, but these things are hard to quantify from our end. There are so many factors

that affect how your engine wears, what kind of mileage you get, and how long your

engine will last that we could never issue a blanket one-size-fits-all statement saying “You should use X.”

We did not find that synthetic oil gave us better fuel economy, but that doesn’t mean that you won’t. Feel free to try this experiment
at home and let us know what you find. Or, if you’re not experimentally-inclined and you’re wavering about what oil to use, feel free

to use whatever fits your wallet. Any API-certified oil is going to be quality oil, and your engine should be happy with whatever you

choose.

source.
https://gallery.mailchimp.com/f641390cba42169db49e0cd6e/files/ENG_newsletter_July_2016.01.pdf

 

[Cummins2014]

Synthetic or Conventional?

So...which oil to choose? We get asked this question hundreds of times a year on the

phone, in e-mails, and written on oil slips. And honestly, from a wear standpoint, we don’t

find a lot of difference between conventional and synthetic oils. Some engines may run

better on one than the other, or maybe you find that your engine uses less oil on one or

the other, but these things are hard to quantify from our end. There are so many factors

that affect how your engine wears, what kind of mileage you get, and how long your

engine will last that we could never issue a blanket one-size-fits-all statement saying “You should use X.”

We did not find that synthetic oil gave us better fuel economy, but that doesn’t mean that you won’t. Feel free to try this experiment
at home and let us know what you find. Or, if you’re not experimentally-inclined and you’re wavering about what oil to use, feel free

to use whatever fits your wallet. Any API-certified oil is going to be quality oil, and your engine should be happy with whatever you

choose.

source.
https://gallery.mailchimp.com/f641390cba42169db49e0cd6e/files/ENG_newsletter_July_2016.01.pdf

Its refreshing to get an unbiased opinion on oil . It kind of shoots down some opinions on here running expensive synthetic oil. Never have bought in. Thanks for the report.

 

[Eagle6.7L]

I was understanding that Cummins pours Valvoline Blue conventional in these engines before they are shipped.Validation must be with Shell since Shell sponsor's Ferrari in F1.Is MOPAR diesel engine oil manufactured by Shell....