fuel treatment?
Nope.. you should be fine. I'm using the same oil and like yours, my truck is running great. You must be running the same 'LE' formulation as I am. Yep.. it lists CJ4 on the specs, along with Cummins CES 20081. It's priced really well for a semi-synthetic... $13/gallon here. What's it going for where you are?
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