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Old 09-07-2006, 08:42 AM
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302 Z28 302 Z28 is offline
 
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I like to change it about every 50K miles, but I know people who have never changed it and have 200K miles on their cars and truck. I would use synthetic if it were mine. Royal Purple Max gear oil already has the posi trac additive in it.

Vince
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