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    MS-12633 Oil Spec

    I have a new 2022 Ram Power Wagon that calls for 0W-40 oil that meets the MS-12633 specification. PUP 0W-40 meets that spec and is called for by name in the owners manual. There are I think two others, Red Line and Amsoil, that are supposed to meet this spec, but I do not want to use a hard to...
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