Quote:
Originally Posted by MrPogle
Imagine coming up to some red traffic lights. You get off the accelerator, head towards them and when you get close you apply the brake to come to a standstill.
Without coast. When you come off the accelerator the injectors shut down and you slow down due to engine braking until you apply the brakes. Then you use some brakes to stop. You burn no fuel and use some brake pad.
With coast. When you come off the accelerator you "freewheel" towards the lights. You slow down less due to the lack of engine braking so you have to use more brake pad to stop and the engine has to be kept running on your approach to the lights. So you use more fuel and more brake pad.
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If lights change on me I use the gear paddle to drop gears straight away disengaging coasting
, no fuel used at all.