@jigzyy...Hypermiling refers to a collection of driving techniques aimed at improving your car's fuel efficiency by reducing the demands placed on the engine. Since it's possible to improve fuel economy by 37% just by changing the way you drive.(reference http://www.edmunds.com/advice/fueleconomy/articles/106842/article.html). u can do following steps to increase fuel efficiency:
1. Drive as if you don't have brakes. Stopping and starting kills gas mileage. Increase the amount of distance between you and other vehicles, don't race to red lights or traffic obstructions.
2. Be gentle with the accelerator. When you slam down on the gas pedal, it pushes more fuel into the engine, making it run faster (and lowering the fuel economy and increasing your output of pollutants). Push the pedal down slowly, and lift it up as soon as you know you're going to need to stop (when you see a red light, a stop sign, or brake lights from the car ahead of you).
3. Avoid idling. Turning off the engine when you stop for more than one minute can improve fuel efficiency by 19%. (reference http://www.edmunds.com/advice/fueleconomy/articles/106842/article.html)
4. Go slower up hills, and faster downhill. Going uphill slower allows you to use your momentum to help keep your car from using extra gas to get up the hill. If you plan for a hill by going faster you'll get further up the hill before you need to use extra gas. While going downhill you can go faster using less gas, as such don't lay off the pedal completely, use it until you're going a little faster than normal.
5. Minimize the engine load. Generally, it's better for your fuel economy if you maintain a steady speed, which is why using cruise control and driving at or below the speed limit is an important part of hypermiling.
6. Park for easy departure. Instead of searching for the perfect spot close to an entrance (which will involve stop and go driving, especially with pedestrians involved and other drivers pulling in or out of their spots) pull into a spot that's further away from the entrance. Look for the parking spot with the highest elevation and park face-out so that when you start the car and the engine is cold (at the lowest efficiency) you can use gravity in your favor without having to spin your car around.
7. Check tire pressure regularly. If the tires are incorrectly inflated, then there will be excess drag, or not enough surface contact with the road. The car therefore suffers a drop in efficiency.
8. Reduce the junk in the trunk. The more weight you're carrying, the more the engine and drive-train have to work. Removing all of that unused junk in the trunk increases efficiency.
hope this will help.