Thread: 5.9 to 5.2
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Old 02-13-2012, 04:12 PM
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All other things being equal, better fuel economy purely due to a smaller engine displacement is a myth. A 5.9L Magnum motor makes more torque than a 5.2L and therefore will move a given vehicle more efficiently - inversely, less throttle is needed to do the same amount of work. I've had 4 5.2L Magnum trucks (a 94, a 95 and 2 98s) and a 01 5.9L and the 5.9L not only had more low end torque, but it was in a 4x4 and got the same mileage as the 5.2L in a 2WD (same cab configuration, same gears, even the same camper shell). I wouldn't downgrade.
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