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    Amsoil AME 15W40, 14K, 04 Duramax 202K

    I'm following this with interest as I have a 2003 Duramax 6.6l and am using the same oil. I started using synthetics in Alaska when I moved up there. It saved my Chev 350 engine as many people running dino oil had numerous front rod journals go. I worked at Prudhoe Bay for 6 years and wheels...
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