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Thanks everyone for the prompt and helpful replies. Just to make sure I'm understanding, even in 87 the motor still needs zinc additive? If that's the case as it's still in the 60's here I will order several quarts of Brad Penn 20/50 synthetic which she can refill with and a zinc additive for the moment? With preemptive oil checking, what is a decent mileage to tell her it's time to have a good shop drop the motor and refresh it? (Somewhere between now and catastrophic failure) As a rough ball park what does a no internal damage stock rebuild go on a 3.2?
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