Quote:
Originally Posted by toc
I thought about this some more and really believe it's up to the conditions at the time you have to make the decision.
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Sure, you have to use the best technique for a given situation.
Usually, the best way to slow down is (from best to worst)
coasting engine off
coasting engine on
engine braking with regen (mild and full hybrids)
engine braking without regen
braking (friction)
When going downhill, coasting may lead to excessive speed, so engine braking is the technique to use (best with regen) on steeper slopes.
Mild slopes can sustain coasting - or help your car run in top gear without lugging the engine