The price of gas may go up and it may go down but gas costs us all a lot of money. Any savings that can be made will be worthwile and are longterm so increasing the miles you get for every gallon of gas will help.
There are devices that claim to help you to achieve this and some of them sound very promising but most people start out by learning to drive in a way that saves you fuel.
Hard driving uses a lot of gas but if you can learn to drive more gently there are big savings to be made.
Learn about how you can run your car on water and also learn how to drive more economically and save gas.