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Oil Change from conventional to synthetic
2014 6.7 Cummings. The original oil, in the truck when I bought it, was a conventional 15W-40. I’m wanting to go to Valvoline premium blue synthetic . My question is is do I go with the same weight oil? And is it necessary to do a flush before I change over? I always change my own oil but I...- Donalson
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- Forum: General Discussions
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