Didn't mention got over 250,000 miles on the 71 86 TPI motor and 129,000 on the 93 sub. I drive the 71 everyday to work, and I travel between SC, and NC. Never had any kind of oil related problems with any of the cars. Oh 94 cadliac has 60,000 wifes car. What can I say. Like before I think it's what ever you want to use, doesn't matter. Just keep it changed.
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Andy
71's Are for ever!!! or 67,68,69,70,72
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