I am new here too. This is very interesting. When I read it I thought it wasn't quite right. It did make me think about my slowing down. I now use a combination of fuel off in gear coasting, and neutral engine idling. I don't shut the engine off while driving. This seems dangerous to me.
The definition of Hypermiling is...The act of driving using techniques to maximize fuel economy. With this in mind regenerative slowing, and braking are best. The next two can be switched depending on if you want to slow down. Modern vehicles with fuel off coasting does cause the vehicle to slow more quickly than neutral engine off. If your goal is to slow down then fuel off coasting will help slow down. If your goal is to go farther without slowing then neutral with engine off is better.
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