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Regular Contributor
hello i was told that sae#30 shell rotella oil was the best to use in old gas engines I have twin 318 Chrysler engines one is a 1971 & the other is a 1972, also I was told to add an additive but I forgot just what it was I asked the guy in the auto parts store and he said a zink addative, another person said sea foam so what would you sugest
Thanks Bob
Thanks Bob