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... I've always heard gas stations get their midgrade gas, by pulling from the lower and higher grade gas tanks. Don't know that for sure, but if so you could probably find a place that sells high octane race gas and buy a couple of gallons to mix in with what you have.

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That sounds like a big 'wives tale' story.

Gas is very regulated and monitored. No way of blending high and low octane at the pump.

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Incorrect. Mixing the two is exactly how mid-grade is concocted.

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But not at the pump. They have separate tanks in the ground.

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