It used to be common practice in the 60’s and 70’s to change oil every 3 to 5 thousand miles.  Amsoil Synthetic oil reduces maintenance, annual oil costs, and there is less waste oil disposal. Amsoil synthetic Signature series oils can go 1 year or 25K miles under normal driving conditions, or under severe operating conditions every 15K. Federal Law protects you against dealers that say extended drain intervals VOIDS your new car warranty.  Amsoil saves money because you don’t have to change your oil as often.

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