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  1. V

    Amsoil SS 15-40 vs other top tier oils

    I have been using T6 and usually change it out every year in November. I really should start sending it out for analysis. All the other fluids have been changed out at least once. I did use TranSynd for the Allison fill per the good advice found here. I hope to have this truck for another 17...
  2. V

    Amsoil SS 15-40 vs other top tier oils

    10k on the oci. Clearly the cost is the biggest drawback. I'm going to use this for a low mileage (60k) 2006 LBZ Duramax. It doesn't get driven very often, but when it does, it works hard. Corrosion resistance is one of my primary concerns due to infrequent use. I am really not too concerned...
  3. V

    Amsoil SS 15-40 vs other top tier oils

    Is Amsoil SS 15-40 on the same level as other top tier oils? Pro's and con's to each in your opinion please.
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