Oil Grade? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 6 (permalink) Old 05-24-2007, 02:31 AM Thread Starter
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Oil Grade?

Hi folks:

I'm a new member as well as a new owner of an 07 3500 SRW LB with 6.7L and 6 sp auto. I'm having my dealer cough up the correct Diesel Engine Manual.. I one I received( first edition or first printing) doesn't cover my truck; its for the 5.9L engine. Damyler_Chrisler says I need the 3rd edition. Until I get the right manual I need to know what grade oil is required. I've got some Delo 400 which I think is rated CG-4, CH-4, and CI-4. Is this OK for the 6.7? Or does it require something like CJ-4? At the rate the dealer is going I'll need to change oil before I get the right manual. Thanks for your help.

My previous truck was an 03 Chevy with the Duramax/Allison combination. I think I'm gonna like the Dodge a bit more. I like the feel of more torque at lower RPMs.
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post #2 of 6 (permalink) Old 05-24-2007, 10:41 AM
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everything that has a DPF needs CJ-4 rated oil to my knowledge.
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post #3 of 6 (permalink) Old 05-24-2007, 04:21 PM
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yes anything with a dpf as stated needs cj4 oil the old oil will cause higher ash output and shorten dpf life

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post #4 of 6 (permalink) Old 05-25-2007, 01:34 AM
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Also I believe the new oil is formulated better for the EGR system.
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post #5 of 6 (permalink) Old 05-25-2007, 02:46 AM
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And from what I've heard the "new" oil will be the only oil soon.
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post #6 of 6 (permalink) Old 05-26-2007, 11:08 PM Thread Starter
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Thanks for the information

Last night I returned a case of the old Delo CI-4 oil to Costco where I had been buying it for the past several years. They took it back without any problems. I checked the shelves and they now carry only the CJ-4 oil. It seemed to be about the same price as the CI-4 oil, about $55 or so. I was doing 3000 mile oil changes on my Chevy Duramax and I'm not sure it was worth it. I think it may have contributed to how long it took for the engine to get broken in where fuel mileage and power improved substantially. I think that on my Cummins I'll strech out the oil change interval. I've heard that Dodge specifies a shorter interval than Cummins does on this engine.

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