Question 5447
Is it advisable to drive with the engine at idle? That is, at the lowest possible engine speed.
- Yes, because it uses less fuel.
- It is advisable, but only in gasoline vehicles, not diesel.
- No, because it uses more fuel.
Show answer and explanation
Correct answer: No, because it uses more fuel.
No. At idle, the engine uses fuel just to keep running. In the picture, the dashboard shows N at 55 km/h, so the car is coasting in neutral and using fuel. With a gear engaged and your foot off the accelerator, fuel injection cuts off and fuel consumption is zero. This applies to both gasoline and diesel engines.