Have had several discussions lately with people debating whether it is more economical to take the car out of gear and coast where possible to save on fuel (for example approaching a roundabout or junction/ downhill) , or whether the car saves more fuel by simply lifting off the accelerator and leaving in gear?
Sure I read once that the fuel is shut off as soon as you remove your foot from the pedal so would therefore make no difference either way, just safer to have it in gear?
From a common sense view I thought that by leaving it in gear your revs are higher than idle = more fuel consumption but I could be wrong?!
Discuss
