This article provides 5 tips for saving money on gas: 1) Carpool with friends to share fuel costs; 2) Use smartphone apps to find the cheapest gas prices; 3) Limit idling time which wastes gas; 4) Drive smoothly by avoiding quick acceleration and braking; 5) Ride a bike for short trips to eliminate gas use entirely. Following these tips can help keep more money in your wallet and less spent on filling your gas tank.