Apparently when coasting in gear or engine braking (on a standard), the engine cuts off fuel altogether while decelerating until it hits a predetermined limit. When coasting in neutral the engine still uses fuel but at a low rate(idle).
I'll have to experiment with this and compare a downhill glide in neutral vs. say 5th gear.
| Mode | Sustain Speed | Fuel Ef. | Safety |
| Coasting in Gear | worst | best | best |
| Coasting in Neutral | good | worst | good |
| Coasting Engine Off | best | best | worst |
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