Mopar MaxPro 15W-40 Diesel

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Oct 30, 2007
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East TN
Does anyone know who makes the Mopar MaxPro 15W-40 CJ4 Diesel oil? I know that Pennzoil makes all of their gasoline engine oils. Pennzoil is also the maker of their factory fill oils and the bulk oil supplier to their dealerships. The difference here, is that the Cummins engine has, at least in the past, been factory filled with Valvoline Premium Blue. I believe that now it is factory filled with Valvoline Premium Blue Extreme synthetic. So, I'm wondering, does Mopar stay with Valvoline oils in their 15W-40 Diesel oil, or do they use their main supplier, Pennzoil, resulting in, I guess, Rotella T3? I use Mopar engine oils in my vehicles, mainly because I get it by using my RAM MasterCard points, therefore, basically getting it for free because I never carry a balance on the card and never pay interest. I would like to know what I'm putting in my truck, though, in case I have to top off while on the road or change oil when there's no Mopar available.
 
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