Thread: 383 VS 355 gas mileage??.

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My first inclination is to say the 355 would get better mileage. But it depends which one works most efficiently pulling the weight of the van. It is possible that a 355 that is working harder to move the van could use more gas than a 383 that is working more efficiently.

Originally Posted by rumrumm

My first inclination is to say the 355 would get better mileage. But it depends which one works most efficiently pulling the weight of the van. It is possible that a 355 that is working harder to move the van could use more gas than a 383 that is working more efficiently.

Yepper-my thoughts too.But if it was just a small difference it "might" worth building a 383 for the extra torque.