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  1. Z

    2024 Silverado 3.0 Duramax, 18.8k mi; 5W-30 Amsoil Diesel Oil 5k mi

    Switched from HPLs 0W-20D after less than stellar wear metal totals. Amsoil 5W-30 Diesel Oil showed a very good reduction in wear metals. Not sure what caused the fuel dilution increase, only thing I can think of is that I use OptiLube XPD every fill up, so I'm going to stop using it as much...
  2. Z

    UOA: HPL PP 0W-20 D, 4977mi, 2024 3.0 duramax Silverado

    Not really sure how to feel on this one. Wear metals very high, but the comments remark that it could be a conflict with my previous oil used, which was Amsoil 100% synthetic diesel oil. Going to do a double flush and move up to 5W-30 and stick with Amsoil
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