Most people are introduced to, or taught to drive an auto using one foot (as was I) – and that is how most drive them.
But there is a lot to be said in favour of using both feet when driving an auto – Honest John, he of the Telegraph motoring columnist is an advocate.
The main advantage of using both feet is that you are less likely to hit the wrong pedal.
My current vehicle is an auto, which I have had for a couple of years now. Being a one footed auto driver, in that time I have on at least two occasions hit the accelerator instead of the brake. I quickly realised my error – with the vehicle accelerating, rather than slowing down. But it is almost certain that when faced with the same scenario, some drivers push down harder on what they think is the brake pedal with the inevitable consequences.
If you are not already ingrained as a one footed auto driver – I would recommend you at least give driving with two feet a go, and see how it feels.