Oil change

[AH64ID]

Regens occur at least every 24 hours of engine run time, so a 500 hour OCI would have a minimum of 20 regens. Several regens shouldn’t do anything.

Using thicker oil to “combat” fuel dilution is not the correct answer.

Non EGR ISB’s with lots more timing run higher cylinders temps than we do and oil temp is not a concern. Normal heavy towing would only net +20-25° over coolant, which is not an issue.

With modern oils soot will still do quite a bit to thicken the oil. Modern oils, CI and more current, fight agglomeration of the soot particles which makes them nearly impossible to filter out even with a 2 micron bypass filter.

That 20w-50 is 20% thicker at 40°C than the recommended 15w-40 DME Amsoil.

You can justify the 20w-50 anyway you want, but it’s not the correct oil for your application and will potentially do more harm than good in the long run.

 

[firehot]

Right now I'm just doing it once a year.

 

[JR]

Fuel dilution should be a non factor in the 13+ CM2350 software. If it is an issue its more likely from usage than the emissions programming.

 

[Newsa]

Right now I'm just doing it once a year.

Right now, you are regening only once per year?

 

[NIsaacs]

Right now, you are regening only once per year?

Probably changing oil.

 

[NIsaacs]

I have a 2020 3500 HD Ram I think they used synthetic oil from the factory

According to this article, Valvoline Premium Blue 10w-30 synthetic blend is the factory fill, in part is says this:

"The latest product of Valvoline’s 25-year relationship with Cummins, the new oil is the recommended product for Cummins’ current portfolio of products in North America. It is also the new factory fill engine oil for Cummins Natural Gas engines (ISX12 N, L9N, B6.7N) and the Cummins X15, X12, L9 and B6.7 diesel engines."

https://www.trucknews.com/transportation/cummins-valvoline-unveil-one-oil-for-them-all/1003143491/

PI sheet:

https://na21.springcm.com/atlas/Lin...2d889bd1/da4f8c03-5a70-ea11-9c34-ac162d889bd1

There seems to be a push by most of the oil manufacturers to develop the synthetic blends.

Schaeffer's says the synthetic blends hold the additive package longer than full synthetic.

 

[Newsa]

Schaeffer's says the synthetic blends hold the additive package longer than full synthetic.

Interesting,. I thought the additive packages were supposed to mix better and stay suspended slightly better in conventional rather than a group IV or V synthetic?

 

[NIsaacs]

Interesting,. I thought the additive packages were supposed to mix better and stay suspended slightly better in conventional rather than a group IV or V synthetic?

I think that is why the blend, the synthetic gets mixed with conventional. The best of both worlds?

 

[Newsa]

That 20w-50 is 20% thicker at 40°C than the recommended 15w-40 DME Amsoil.

Does that mean that a 5w 40 would be 40% thinner than a 15w 40 at 40 C? I realize the SAE scale s not perfectly linear, but it is based relative to the SAE weight grade nearest it.

 

[Newsa]

Fuel dilution should be a non factor in the 13+ CM2350 software. If it is an issue its more likely from usage than the emissions programming.

Fuel dilution is likely more common than most people realize. I've seen it with long trips as well as short trips. I can go 6 months and get a report with negligible fuel dilution, so I don't expect an injector issue. Then I can go another 4 months and have 7%.

Even people who do UOA's may not get an accurate report of fuel dilution. I've seen less than 2% on my UOA report and also as high as 6% fuel dilution on one report and 7% on another.

This video is not about an ISB. But it does show oil analysis reports taken from the same oil change and it is why I say that fuel dilution can be present even unnoticed on a UOA. There are others who have testimony about the inaccuracy of fuel dilution on their reports that is not in video format.

 

[AH64ID]

Fuel dilution is not an issue for 13+ trucks in good working order being driven with proper duty cycles for modern diesels.

Does that mean that a 5w 40 would be 40% thinner than a 15w 40 at 40 C? I realize the SAE scale s not perfectly linear, but it is based relative to the SAE weight grade nearest it.

Using Amsoil's Signature series, since it's data is easy to obtain, the 5w-40 is 16% thinner at 40°C than 15w-40.

 

[Newsa]

Fuel dilution is not an issue for 13+ trucks in good working order being driven with proper duty cycles for modern diesels.



Using Amsoil's Signature series, since it's data is easy to obtain, the 5w-40 is 16% thinner at 40°C than 15w-40.

Can you supply me with the link that has the data to say that 20w 50 is 20% more viscous than 15w 40 at 40C?

 

[AH64ID]

Right off of Amsoil's website.

https://amsoilcontent.com/ams/lit/databulletins/g3557.pdf

https://amsoilcontent.com/ams/lit/databulletins/g3467.pdf





Since this thread is really about the 19+ oil here is some interesting data. Again, using Amsoil Signature series since it's easy to obtain.

The standard oil is the 10w-30 with 5w-40 being acceptable for year round use in a wider temp range.

5w-40 is 21% thicker at 40°C than 10w-30... goes to show there is more to the story than just the viscosity rating. That is synthetic vs synthetic, and the 5w-40 only has a 1°F advantage in cold weather pour point. You can see why 15w-40 isn't recommended as it's 43% thicker than 10w-30.

Using the factory fill that @nissacs posted the Amsoil 5w-40 is still 17% thicker. The Amsoil 5w-40 does have a 7°C advantage in cold pour point thou.

 

[Newsa]

Right off of Amsoil's website.

https://amsoilcontent.com/ams/lit/databulletins/g3557.pdf

https://amsoilcontent.com/ams/lit/databulletins/g3467.pdf





Since this thread is really about the 19+ oil here is some interesting data. Again, using Amsoil Signature series since it's easy to obtain.

The standard oil is the 10w-30 with 5w-40 being acceptable for year round use in a wider temp range.

5w-40 is 21% thicker at 40°C than 10w-30... goes to show there is more to the story than just the viscosity rating. That is synthetic vs synthetic, and the 5w-40 only has a 1°F advantage in cold weather pour point. You can see why 15w-40 isn't recommended as it's 43% thicker than 10w-30.

Using the factory fill that @nissacs posted the Amsoil 5w-40 is still 17% thicker. The Amsoil 5w-40 does have a 7°C advantage in cold pour point thou.

Thanks, I appreciate that. I changed my post. It is kinematic viscosity that appears to be 20% more, but since this is not a linear scale, the % is deceptive.

I noticed their marketing write up for this oil says it can be used to combat fuel dilution

 

[JR]

Fuel dilution is likely more common than most people realize. I've seen it with long trips as well as short trips. I can go 6 months and get a report with negligible fuel dilution, so I don't expect an injector issue. Then I can go another 4 months and have 7%.

Even people who do UOA's may not get an accurate report of fuel dilution. I've seen less than 2% on my UOA report and also as high as 6% fuel dilution on one report and 7% on another.

This video is not about an ISB. But it does show oil analysis reports taken from the same oil change and it is why I say that fuel dilution can be present even unnoticed on a UOA. There are others who have testimony about the inaccuracy of fuel dilution on their reports that is not in video format.

Any reputable lab will accurately detect fuel dilution. FTIR test at a minimum or gas chromatography are accurate at fuel detection. Unfortunately many labs cheap out and use the oils flash point and/or viscosity as indicators which are not accurate. Too many variables involved, as you noted.

 

[AH64ID]

Thanks, I appreciate that. I changed my post. It is kinematic viscosity that appears to be 20% more, but since this is not a linear scale, the % is deceptive.

I noticed their marketing write up for this oil says it can be used to combat fuel dilution

The scale is not linear but that makes the %age more intuitive, not deceptive.

 

[Newsa]

The scale is not linear but that makes the %age more intuitive, not deceptive.

Interesting that if you compare as a percentage,

Amsoil Dominator 20w 50 is only 5% more viscous than Chevron Delo conventional 15w 40 both at 40 C

137.5/131 = 1.05

 

[AH64ID]

Interesting that if you compare as a percentage,

Amsoil Dominator 20w 50 is only 5% more viscous than Chevron Delo conventional 15w 40 both at 40 C

137.5/131 = 1.05

Which specs are you looking at? I show it as 22% thicker as well.

https://cglapps.chevron.com/sdspds/PDSDetailPage.aspx?docDataId=481951&docFormat=PDF

Speaking of Delo, the New 400 SDE has impressive specs for a conventional oil.

 

[Newsa]

Which specs are you looking at? I show it as 22% thicker as well.

https://cglapps.chevron.com/sdspds/PDSDetailPage.aspx?docDataId=481951&docFormat=PDF

Speaking of Delo, the New 400 SDE has impressive specs for a conventional oil.

 

[AH64ID]

That's not current oil, and CJ specs were not great. That was a good oil to supersede.