Fuel efficient tires are made with innovative combinations of materials that generate less heat during the drive. These tires also have a reduced tread depth to further decrease the resistance factor. Of course, many people overlook another way they can help even fuel efficient tires save even more precious fuel; reducing the weight of your vehicle. Are you lugging around tools, equipment, and other heavy objects you might not need right at that moment? Removing them and lightening your load means less work for your engine, plus a cleaner vehicle.