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You're right Rich. My only concern was just what Cummins thought as they're the guys that warranty my engine, which I've used once already.
I, however have used PS in my previous Dodge and this one. The reason being that my drivers always used it in our fleet and I figured they are the ones that should know. I understand that there are a number of other additives that sound like they would be better, but if I can't walk in a store and buy it than I don't want to mess around with ordering it.
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