I'm afraid of running out of gas on the highway. Can I put an iron pot in the car first?

I was afraid of running out of oil on the highway, so I put an iron pot on the car first, because it was not safe. Almost every city on the expressway has a rest area in front and back, and there are gas stations in it. Generally, the distance between cities is half an hour to 50- 100 kilometers per hour. After the red light alarm, the car can continue to run for 30-50 kilometers. It is not possible or necessary to put an iron pan on the car first.