Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - Ridiculous fuel mileage
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Old 11-13-2012, 02:43 PM   #38
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Originally Posted by Focus YBTC View Post
Or in other words with bigger heavier wheels you have four flywheels by definition at each corner. A flywheel being a device that is used to store rotational energy. Just be gentle getting them up to speed and your fuel economy will be quite fine.
This is incorrect, the rate you speed them up makes no difference. The amount of energy in them is a function of their rotational inertia and how fast they are spinning. How fast you get them to that rotation rate makes no difference.

Besides, the energy is lost when you hit the brakes.
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