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  1. J

    Amsoil has a new 0W-40 synthetic signature series oil for the viper.

    I have a 2008 coupe and have been using amsoil in it and all my other vehicles. Amsoil did not make a 0W-40 oil as recommended so I used 10W-30 racing oil which I found to be the best for keeping my oil pressure from going too high. It seems if I used 15W-50 oil the oil pressure was way too high...

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