Checking and adjusting the pressure of your tires once a month can increase a car’s fuel efficiency by up to 3%.**
Rapid acceleration and braking often can decrease instantaneous fuel economy by up to 33%.**
Turn off your car when it’s safe. When your AC is on, you are paying 2¢–4¢/min. With the AC off, you pay 1¢–3¢/min.**
Removing 100 pounds of stuff from your trunk could increase fuel efficiency by 2%.**
If driving at 60 miles per hour or more, keep the windows up. Open windows create a lot of aerodynamic drag, which can lower your fuel efficiency when driving at high speeds. Also, remove the roof rack if you’re not using it, for up to 10% savings on fuel.**
It is good to get into the habit of changing up to a higher gear as soon as you can. Higher gears are more economical in terms of fuel consumption.**
Aggressive driving (speeding, rapid acceleration and braking) wastes gasoline. It can lower your gas mileage by 33% at highway speeds and by 5% around town. Sensible driving is also safer for you and others, so you may save more than gas money.**
Using cruise control on the highway helps you maintain a constant speed and, in most cases, saves gasoline.**
Fixing a car that is noticeably out of tune or has failed an emissions test can improve its gas mileage by an average of 4%, though results vary. Fixing a serious maintenance problem, such as a faulty oxygen sensor, can improve your mileage by as much as 40%.**
You can improve your gas mileage by 1%–2% by using the manufacturer’s recommended grade of motor oil. For example, using 10W-30 motor oil in an engine designed to use 5W-30 can lower your gas mileage by 1%–2%. Using 5W-30 in an engine designed for 5W-20 can lower your gas mileage by 1%–1.5%. Also, look for motor oil that says "Energy Conserving" on the API performance symbol to be sure it contains friction-reducing additives.**
Replacing a clogged air filter on vehicles with fuel-injected, computer-controlled gasoline engines — such as those manufactured from the early 1980's to the present — or diesel engines does not improve fuel economy, but it can improve acceleration.
Replacing a clogged air filter on an older vehicle with a carbureted engine can improve both, fuel economy and acceleration by a few percentage points under normal replacement conditions.**
The vehicle you choose is the most important fuel economy decision you'll make. The difference between a car that gets 20 mpg and one that gets 30 mpg amounts to $903 per year (assuming 15,000 miles of driving annually and a fuel cost of $3.61/gallon). That's $4,515 extra in fuel costs over five years!
Why take a less-efficient SUV to work when a smaller, more fuel-efficient car will do? And if public transportation or carpooling is an option, you'll not only save on gasoline, but also wear and tear on your vehicle.**
Are you going out to run weekly errands, or are you just dropping one letter off at the post office and coming right home? You will essentially cut distance traveled and fuel usage in half by making all your stops at once, instead of taking lots of short round trips.**
A shared journey means one less car on the road. This helps to reduce traffic congestion and fuel consumption and you can share the cost of fuel too.**