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Old 01-18-2017, 09:15 AM   #2 (permalink)
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Join Date: Sep 2012
Location: Victoria, BC
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Firefly EV - '98 Pontiac Firefly EV
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I don't see it making you much more efficient.

There will be a tiny bit less drag on the engine/less friction. So little that I doubt you'll notice it.

There will be less weight to spin up, so you will waste a bit less energy as you accelerate. That might be noticeable enough if you do a lot of city driving. If you spend most of your time cruising on the highway, it will be negligible.
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