Slow down - Cars get about 21% more mileage at 55 mph then at
70 mph. As speed increases, fuel economy decreases exponentially.
Also, if you don’t speed, you won’t have to worry about getting
a speeding ticket - which costs money.
Check your tire pressure -Under-inflated tires are one of the most
commonly ignored causes of poor MPG. Tires lose air due to time
(about 1 psi per month) and temperature (1 psi for every 10 degree
drop); under-inflated tires have more rolling resistance, which
means you need to burn more gas to keep your car moving.
Check your air filter - dirty air filters restrict the flow of air
into the engine, which harms performance and economy. Air filters
are easy to check and change; remove the filter and hold it up to
the sun. If you can't see light coming through it, you need a new
one. Consider a K&N or similar "permanent" filter which is cleaned
rather than changed; they are much less restrictive than throw-away
paper filters, plus they're better for the environment.
Accelerate with care - driving an automatic? Then you should be
accelerating moderately so the transmission can shift up into the
higher gears. Stick-shifters should shift early to keep the revs
down. Keep an eye well down the road for potential slowdowns.
Hang with the trucks - trucks tend to roll along at the same pace?
A constant speed keeps shifting to a minimum -- important to those
who have to wrangle with those ten-speed truck transmissions -- but
it also aids economy, as it takes much more fuel to get a vehicle
moving than it does to keep it moving.
Get back to nature - Consider shutting off the air conditioner,
opening the windows and enjoying the breeze. It may be a tad warmer,
but at lower speeds you'll save fuel. That said, at higher speeds
the A/C may be more efficient than the wind resistance from open
windows and sunroof.
Back off the big wheel - big wheels and tires may look cool, and
they can certainly improve handling. But if they are wider than the
stock tires, chances are they'll create more rolling resistance and
decrease fuel economy.
Clean out your car - If you are type who takes a leisurely attitude
towards car cleanliness (and I definitely fall into that category)
periodically go through your car and see what can be tossed out or
brought into the house. It doesn't take much to acquire an extra
50 lbs. of stuff, and the more weight your car has to lug around,
the more fuel it burns.
When old man winter coats your car with snow and ice, try to get
off as much of it as you can, don't just clear a hole in the
windshield. Snow and ice not only add significant weight to your
car, they also increase aerodynamic drag dramatically... which
burns even more gas. As a side benefit, clean clear windows improve
your ability to see, which improves your margin of safety in our
dangerous winter driving.
Remove bike or ski racks in between trips. It's not really the
extra weight that hurts your gas mileage; it's mostly aerodynamic
drag.
Don’t fly flags on your car or outside your car’s windows. It’s
aerodynamic drag we are talking about here... and your gas bill.
Do not fill your tank up completely. Instead, keep it half full.
Depending on your tank size, your car will have 50-100 pounds
less to haul all the time... less weight, less gas.
Downsize - If you're shopping for a new car, it's time to re-evaluate
how much car you really need. Smaller cars are inherently more fuel-
efficient, and today's small cars are roomier than ever.
Plan your route to avoid traffic jams. You might avoid jams sometimes,
if you learn traffic patterns in your area and use them to your advantage.
Don't drive - the fact is that if you can avoid driving, you'll save
gas. Take the train, carpool, and consolidate your shopping trips.
Walking or biking is good for your wallet and your health. And before
you get in your car, always ask yourself: "Is this trip really necessary?"