Here's a great article on the subject for those who aren't familiar.
http://www.gasolinecreditcards.com/ecotrekker/2008/03/04/the-ultimate-guide-to-hypermiling-100-driving-and-car-tips-and-resources/The Ultimate Guide to Hypermiling: 100 Driving and Car Tips and Resources
Tuesday, March 4, 2008 at 10:08am by admin
Hypermiling, or driving your car “in a manner that maximizes mileage,” has become more popular among drivers worldwide, as concerns over increasing gas prices and environmental issues heighten. Whether you’re trying to make a difference by helping the environment, or you’re just aiming to save a few more dollars at the pump each month, check out this ultimate guide to hypermiling, which provides tips and resources for smart driving.
Driving Tips
Below is a list of hypermiling tips that drivers can implement while behind the wheel. We recommend practicing one or two tips at a time and gradually working your way up to the whole list so that you aren’t overwhelmed.
Drive a stick shift: If you’re used to driving automatic, switching over to a stick shift might take a little practice, but it’s definitely worth it. Once you have more control over the vehicle, you’ll be able to master more hypermiling tricks.
Stop speeding: The harder you press the gas pedal, the more gas you’re using. If you’re driving over the speed limit, you might save time, but you’re definitely wasting gas and money. Slow down a little if you can so that you’re driving at or just below the actual speed limit.
Coast instead of braking: When you see a stop sign up ahead or a traffic light turning yellow, immediately take your foot off the gas and let your vehicle slow down by itself. If you wait until the last possible minute to brake, then you’re wasting all the gas you used when you could have been slowing down.
Cruise Control: One automatic setting that actually helps hypermiling is cruise control, which prevents “you from “creeping” up in speed without realizing it,” according to Epistolary.org.
Put your car in neutral: Coasting with your car in neutral takes the burden off your gas pedal preventing you from wasting fuel. If you’re not driving in heavy traffic, experiment with this effective money saver.
Lighten the load: The heavier your car is, the harder it has to work to propel itself forward. Empty out your trunk and backseat of ice chests, beach chairs, and other items that you’re not using to lighten the load.
“Shift slow and low”: The site Epistolary.org urges drivers to “shift slow and low,” whenever possible to give your vehicle more mileage.
Drafting: This technique comes with a warning sign: according to many hypermiling experts, it is incredibly dangerous. A “deliberate form of tailgating,” the forced auto stop involves turning off your car’s engine and then following closely behind the vehicle in front of you “in order to take advantage of the reduced wind resistance in [the other car's] immediate wake.”
Find a route that’s easy on your vehicle: A story in the Washington Post discusses the benefits of “optimiz[ing] your route” when implementing hypermiling tricks. Instead of taking the scenic route to work, which could include more hills, twists, and dips, try finding a route that features level roads and less traffic lights or stop signs. Generally, “a longer route with better driving conditions” can use “less gas.”
Park in the sun: The blogger Joe Future believes that parking your vehicle in the sun is a hypermiling tip for two reasons: “On a cold day, parking in the sun keeps your car warmer.” Also, a warmer car “will get to “auto-stop” mode faster than a cold car, so you’ll sit idling at fewer red lights while you’re waiting for auto-stop to kick in.”
Roll down the windows if you’re not on the highway: After the scorching hot temperatures of the summer have retreated, stop blasting the air conditioner and roll down your windows. According to Drive.com.au, “It is generally accepted that air-conditioning increases fuel consumption by about 10 percent but winding down the windows increases drag, which is also an enemy of good fuel consumption.” If you’re going to be on the highway, keeping your A/C on low is still a good idea, but if you’re taking a joy ride, think about getting a little fresh air.
Turn off the car before putting it in park: Joe Future suggests turning off your vehicle before putting it in park to save gas. If you don’t, “the gas engine will come on before you shut off the car.”
Don’t leave the car running: It may seem like a good idea to let your car idle while you dash into the store to grab the milk or drop off a rented movie, but doing so wastes gas. Take the extra few seconds to pull into a real parking spot and turn the car off first.
Maintenance Tips
Taking your car for regular check ups is another easy way to maximize mileage. Check out these helpful maintenance hacks that will keep your car running smoothly and efficiently.
Get an oil change: Keeping up with scheduled oil changes will help your engine run more easily. Adequate oil levels and lower-weight oil can also make a difference in how quickly your vehicle burns fuel
Check your tire pressure: Tires that are beginning to lose air and go flat put more stress on your engine, making it work harder and burn more fuel. Keep a tire gauge in your car and frequently check the tire pressure.
Engine Control Module: Your vehicle’s engine control module “controls various aspects of an internal combustion engine’s operation,” including the amount of fuel being used by the engine, the ignition timing, and the variable valve timing. Making sure your engine control module is working properly will help you gauge how much fuel your car is using on a regular basis.
Tire Balance: If your tires aren’t balanced correctly, you could end up wearing out certain tires faster than others, causing them to lose air and forcing your engine to work harder. Get a check-up for your tires if you think yours are out of whack.
Conduct a seasonal check up: During the winter, your car could become bogged down with extra weight from snow chains, heavier tires, or other items. During the summer, you’ll probably be using your air conditioner nearly every day. Before each season, give your car a check up to unburden it of needless weight and to make sure the engine, A/C and other systems are in proper order.