But today, you don't have to do that! The idling you do on today's auto burns valuable energy and leaves energy deposit on the cylinder wall surfaces that stick to it since the cylinders aren't relocating as quick as they typically do. This contaminates the engine oil with carbon deposit and makes your vehicle's innards dirty.
If you drive more on the highway, idling never happens, yet in traffic, you often idle a whole lot, which puts tremendous heat on the engine. The best thing to do is to check out the timer on the web traffic signal and also switch off your car accordingly or keeping the car in neutral and also giving some extra Revoltions Per Minute to the auto to make sure that idling doesn't take place a lot.