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    Amsoil helped the slap

    I recently switched from GC 0W30 to the new Amsoil 5W40 (Thanks Pablo)in my LS1 Camaro. The Amsoil almost totally got rid of my cold start up piston slap. It is barely noticable now. However i still get it on warm restarts, but not as long as I did with the GC. Maybe the GC just wasn't thick...
  2. T

    Amsoil 5W40

    Has anyone used this oil yet? If yes how is it. Any oil analysis yet? I was considering this for my LS1.
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