Bought a 2001 cummings, i was told that when i take for a oil change i should use the same brand of oil. Is that true?

 

Use a good name brand like MOPAR, Rotella or Dello.




From the shop manual........
In diesel engines, use an engine oil that conforms to API Service Grade CF-4 or CG-4/SH (API Service Grade Certification Label—Diesel Engine Oil). MOPAR® provides an engine oil that conforms to this particular grade.


SAE VISCOSITY
An SAE viscosity grade is used to specify the viscosity of engine oil. SAE 15W–40 specifies a multiple viscosity engine oil.
When choosing an engine oil, consider the range of temperatures the vehicle will be operated in before the next oil change. Select an engine oil that is best suited to your area's particular ambient temperature range and variation. For diesel engines, refer to (Engine Oil Viscosity Recommendation—Diesel Engines).

 

Welcome, who makes the cummings?

 

Cummins makes Cummins, there's no "g" in Cummins

 

Welcome, Brand does not matter as long as it is reputable.

 

Just use a good brand name that meets the trucks specs. Wally World's SuperTech probably isn't a good idea...I know some people that use it religiously, and have burned up motors with it.

 

Rotella 15W40 is what I use.

 

i will be using royal purple synthetic long rider 15w-40

 

I used delo 400 for a while and didnt have any problems. . .running amsoil right now and things are going pretty good.

 

My vote goes to Dello 400 but if you cant get Dello then look for either Mobil Delvac or Valvolin Cummins Blue.