b. Combine errands to save time and gas. When you need to make multiple stops, go to your farthest destination first to warm up your engine more quickly for better fuel economy. If possible, park in a central place and walk to each destination. 12. Stay on Your Couch. Shop online and use online services for banking, paying bills, and other tasks that do not require leaving your home. 13. Educate Yourself. There are many resources available to get and stay educated about the best safe driving practices. 1. Click the Cap. Loose, damaged, or missing fuel tank caps cause 147 million gallons of fuel to evaporate each year. Make sure the cap is tight and you can save about $120 per year. 2. Check the Pressure. In 2005, 1.2 billion gallons of fuel were wasted by driving on underinflated tires. Proper tire pressure is safer, extends tire life, and can provide up to 3% benefit per tank of fuel. 3. Twist and Turn. Rotate your tires. Proper rotation can add as much as 10,000 miles to the life of a set of tires. 4. Travel Light. Remove unneeded items from the trunk and avoid using the roof rack. Added weight and air resistance will cause more fuel to burn. DID YOU KNOW? Tires must have at least 2/32 inches of tread depth. The distance between the edge of a penny and the top of Lincoln's head is about 2/32 of an inch. If you slide a penny into a tread groove and can see the top of Lincoln's head, your tires are worn out. MAINTENANCE PRACTICES TO FOLLOW  5. Slim Down. Wind resistance can reduce mileage, so remove luggage racks, roof- top carriers, and ski racks when not being used. 6. Oil Up. Make sure you use the type of motor oil recommended in your vehicle's owner's manual. You can improve your fuel economy 1-2% by using the manufacturer's recommended grade of motor oil. Remember to change the oil regularly because degraded motor oil will degrade fuel economy. 7. Tune Up. A tune up can improve gas mileage by an average of 4%. Visit your local dealership or auto shop on a regular schedule. 8. Keep it Clean. Keep the air filter clean to the point where light can be seen through it. 9. Clogged filters reduce mileage by 10%.