Can I use this oil?

[SGBARRACUDA]

I have been using 15-40 Rottela since I bought the truck new.It's a 07 4x4 quad cab 5.9 CTD.I bought a 55 gal drum of Chevron Delo 400 10-30 oil. It has a API rating of C-J , my manual calls for C-I. What do you think.

 

[JR]

Here is what Cummins says about oil viscosity.

Cummins Inc. primary recommendation is for the use of 15W40 multigrade for normal operation at ambient temperatures above -15°C [5°F]. The use of multigrade oil reduces deposit formation, improves engine cranking in low temperature conditions, and increases engine durability by maintaining lubrication during high temperature operating conditions. Since multigrade oils have been shown to provide approximately 30 percent lower oil consumption, compared with monograde oils, it is important to use multigrade oils to be certain your engine will meet applicable emissions requirements. While the preferred viscosity grade is 15W-40, lower viscosity multigrades can be used in colder climates. See Figure 1: Recommended SAE Oil Viscosity Grades at Ambient Temperatures. Oils meeting API CI-4 and CJ-4 and a 10W30 viscosity grade, must meet a minimum High Temperature / High Shear viscosity of 3.5 cSt., and ring wear / liner wear requirements of Cummins Inc. and Mack tests. Thus, they can by be used over a wider temperature range than 10W30 oils meeting older API performance classifications. As these oils will have directionally thinner oil films than 15W40 oils, top quality Fleetguard® filters must be used above 20°C [70°F]. Some oil suppliers might claim better fuel economy for these oils. Cummins Inc. can neither approve nor disapprove any product not manufactured by Cummins Inc.
WARNING An SAE 10W30 designation on a product is a viscosity designation only. This designation alone does not imply that the product meets Cummins Inc. requirements. Only 10W30 oils with diesel performance credentials listed in table 1 can be used in Cummins® Engines if the reduced ambient temperature indicated in Figure 1 is observed. Only 10W30 oils meeting CES 20078 (API CI-4) and CES 20081 (API CJ4) can be used in the ambient temperature range similar to 15W40 oils.


https://www.google.com/url?sa=t&sou...dMVNzu7mkaSAdv2AQ&sig2=83eFk8EAIGkQA_O6pR2i3g

Technically yes it is possible as long as your oil meets the minimum HTHS of 3.5cSt and liner wear test Cummins requires. The CJ4 is a much better rating given the viscosity in question here. But given you live in a hot climate I would not chance it. Especially if you work your truck.

 

[SGBARRACUDA]

Thanks for the info. I think I will stick to what I have been using since I bought it new. I have plenty of other things I can use the 10-30 Delo in.

 

[Killer223]

if your not towing I'd bet it'll be fine.

 

[amsoilman]

I know of many truckers using a 10W-30 Heavy Duty Diesel oil, and they have been very happy using it. The Amsoil 10W-30 meets Cummins CES20086, CES20081, and has a HTHS rating of 3.6.