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Old 08-30-2021, 10:48 AM
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Grubby Grubby is offline
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Join Date: Nov 2007
Location: Clayton, IN
Cobra Make, Engine: ERA 838
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I was a Product Engineer at GMC Truck in the mid-90s. At that time 1 quart per thousand miles was consider acceptable.

It was rare. Most didn't use enough to need oil between changes.

John
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