Diesel fuel additives can save individuals and businesses money on gas by boosting fuel consumption and increasing engine life. They reduce gunk buildup caused by low quality fuel and contaminants, helping injectors spray properly instead of unevenly. Some additives also add lubrication to engine gears. This results in a smoother running engine that gets better gas mileage and needs less maintenance. Using additives protects engines and minimizes repairs over the lifetime by preventing common problems that occur without proper care. Researching additives ensures selecting one that meets individual needs.