Well, a 6% downgrade is pretty severe. The nearest one of those to me is a good 1000 miles away!
You also have to balance out the lost momentum from regen against the power reclaimed. On the much more common flat-ish land, coasting comes out ahead for this very reason. You do use a little fuel idling the engine, but it's more than counteracted by the momentum not lost to engine braking.
__________________
11-mile commute: 100 mpg - - - Tank: 90.2 mpg / 1191 miles
|