SOMETHING NEW: Offering a "Nitrogen Tire Fill" service in your serv.dept. can entice people to buy tires from you which in turn gives you a chance to provide related under car services. Nitrogen gives you a competitive edge + helps you sell more tires. Tires help sell service. Service helps sell vehicles.Ingersoll Rand makes a nitrogen generator that works off your shop air compressor. Nitrogen provides better tire pressure retention,enhances tire life,better fuel economy+improved safety.