Most of us keep numerous items in our cars—trunks are handy little storage units!—and rarely consider the impact the extra weight our clutter has on gas mileage. According to the Department Of Energy, 100 pounds (45 kg) of extra weight in your trunk could reduce your gas mileage by 2 percent.
It’s not just what’s in your trunk, it’s what’s on top of your car. Those Yakima and Thule roof racks sure make you look outdoorsy, but they create serious drag, which will further reduce your gas mileage. According to the auto experts at Cartalk.com, an empty rack mounted on your vehicle can reduce your gas mileage by 5 percent. Other sources put that reduction as high as 12 percent!
Ultimately, a vehicle’s gas mileage is dependent upon many variables; some are out of your control while others are easily managed. Reducing the amount of weight inside of and on top of your car is completely in your control. You’ll use less gas, create fewer emissions, and save cash, too.
Remove any extraneous stuff you have lying around in your car.
If you have a roof rack, only place it on your car when you need to haul something or are going on a trip. Take it off when you’re not using it.
To gild the lily and make sure your car is performing its best, make sure your tires are properly inflated.