[alvaro84]

And, if you use enutral coasting to slow down on flat, the absolute superiority of fuel cutoff is an old, busted myth. To go on zero fuel while engine braking you have to drive normally for a longer distance than if you coast in neutral, using your momentum better. The gain often outweighs the loss of the idling engine. Steep hills that let you DFCO without slowing down are mostly exceptions. There are exceptions of the exceptions, though: in ciderbarrel's case the Ultragauge confirmed that fuel cutoff doesn't happen, and it's the case with my Teresa too: she doesn't have any kind of FCD,but if you use the kill switch while engine braking the sound changes. The YARDIS is more diligent to cut off the fuel, sometimes she does even with a freezing cold engine.