In order to get or make the best gas mileage vehicle, most people are switching to hydrogen car kits. The hydrogen car kits use water as a fuel and remove or reduce the need to have oil as a fuel. Though initially, the water and oil mixture is required to ensure that the car removes smoothly, in the near future eventually only water will be the need. Once the cost for this conversion is reduced to meet the common mans budget every person will be able to own the best gas mileage vehicle. Besides considering the mileage, other areas that the hydrogen car kit conversion helps is the performance, engine durability and reduced toxic emissions. Presently, in the auto industry the number of people that are purchasing hydrogen powered vehicles in increasing at a steady pace. This is because, in the long run this move is seen a profitable investment when compared to the sharp rise in oil prices.