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    LLY Duramax with Amsoil

    15k on oil. Large spike in copper. Do I change the filter and top off or full oil change 144,374 (5192) 149,786 (10631) 154750 (15950) Iron 10 14 27 Aluminum 2 1. 2 Copper 3 12 308 Lead 0 1 6 Tin 1 0 1 Cadmium 0 0 0 Silver 0 0 0 Vanadium 0 0 0 Silicon 5 6 9 Sodium 3 6 6 Potassium 1 0 3 Titanium...
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