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Old 11-03-2012, 02:14 PM   #7 (permalink)
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Even if your engine has DFCO, it is still losing some energy from friction (pistons going up & down, &c) and from pumping losses, so obviously it is not more efficient.

The danger/illegality issues have been addressed elsewhere, so I'll just point out that what you believe - coasting is unsafe, big SUVs are safer than small cars, all your kids are above average - may not match reality :-)
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