Aggressive drive, (speeding, rapid acceleration and braking) wastes gas. Experts find that it can lower your fuel economy by up to 33% on the highway and by 5% around town. Drive at a constant, moderate speed. According to fueleconomy.gov, this is the single most effective step you can take to reduce your fuel costs. Sensible driving is also much safer for you and others. You may save much more than gas.
OBSERVE THE SPEED LIMIT
While each vehicle reaches it's optimal fuel economy at a different spped (or range of speeds), gas mileage usually decreases rapidly at speeds above 80km/h.
REMOVE EXCESSIVE WEIGHT
Avoid keeping unnecessary items in your vehicle, especially heavy ones. An extra 100 pounds in your vehicle could reduce fuel economy by 2%. This reduction in fuel economy is relative to the overall weight of the vehicle and therefore affects smaller vehicles more than larger ones.
AVOID EXCESSIVE IDLING
Depending on engine size and the use of air conditioning, idling can use a half to three quarters of a litre of fuel per hour. Turn your engine off when parked.
KEEP YOUR CAR CLEAN
Keeping your car clean may reduce drag and improve aerodynamics. Highly aerodynamic vehicles may not yield any noticeable improvement, but the cleaner they are the better they look!
KEEP YOUR CAR WELL MAINTAINED
A vehicle that is well maintained operates with greater fuel efficiency and ultimately improves overall vehicle performance and fuel economy. Fouled spark plugs, a dirty air filter, or a clogged fuel filter will have an adverse affect on your fuel economy. Check your vehicle's owner's manual for maintenance recommendations and schedule accordingly. Address service issues immediately. A check engine light could signal a condition that is causing poor fuel economy.
KEEP TIRES PROPERLY INFLATED
This is one of the most commonly ignored causes of poor fuel economy. Underinflated tires aren't just dangerous, they can devour fuel economy by as much as 25%. Properly inflated, balanced tires along with proper alignment allow them to wear more evenly prolonging their life.
Winter tires are designed to grip the road better during slippery conditions but will also grip the road better when dry. Expect to be safer while using them but do not expect that they will provide you with optimal fuel economy. When purchasing all season or summer tires, look for low rolling resistance tires to achieve better fuel economy.
A roof rack or carrier provides additional cargo space when you need it. However, a loaded roof rack can decrease your fuel economy by up to 5%. Reduce aerodynamic drag by placing items inside the vehicle whenever possible.
PLANNING AND COMBINING TRIPS
Combining errands into one trip saves you time and money! Several short trips taken from a cold start can use twice as much fuel as a longer, multipurpose trip covering the same distance when the engine is warm.
DON'T TOP OFF YOUR TANK
Trust the auto shutoff. Overfilling your tank can lead to evaporation and wasted gas.
BE SURE YOUR GAS CAP IS TIGHT
Improperly seated gas caps allow over 150 million gallons of fuel to vaporize each year in North America.
ANTICIPATE STOP SIGNS AND LIGHTS
The less you have to stop, the better your fuel mileage. Make it a game to catch all the green lights. Laugh at the other guy as he sprints from red light to red light!
USE THE HIGHEST GEAR POSSIBLE
Drive in the highest gear possible when you are cruising at a steady speed.
WINDOWS OPEN OR CLOSED?
Yes, air conditioning uses fuel. However, driving with your windows down at highway speeds increases drag on the vehicle and causes more fuel consumption than air conditioning. If it's hot, roll up the windows at highway speeds and turn on the A/C. When driving at lower speeds, turn the A/C off and roll those windows down.
DON'T REV THE ENGINE
While it may sound cool, revving an engine while sitting still does nothing but waste fuel.