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    Oil additive experience

    I have a new Promaster and like the rest of you, I need it to last. The recommended oil is 0W20, 5W20, or 5W30, non-synthetic, depending on climate and availability. The same 3.6 is found in, and calls for 5W30 in many other Ram and Dodge, Chrysler, and Jeep vehicles. I’m wondering if anyone...
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