Car Guides

How can I improve my older SUV’s gas mileage?

John Paul, AAA Northeast's Car Doctor, answers a question from a reader looking for ways to get more miles per gallon out of his SUV.

The Ford Excursion. Globe photo by Stephen Rose

Q. I drive an older Ford Excursion that I love for a variety of reasons, including its third row, sizable rear storage, four-wheel drive, and towing capacity. This huge truck solves many of my family’s current needs; however, one drawback is the horrible fuel economy. With plenty of family pick-ups and drop-offs, some days it seems like I can watch the gas gauge move. Even though gas prices are pretty low, is there anything I can do to improve mileage? Online I have seen discussion about fuel additives that can increase mileage by 30 to 50 percent, but I’ve heard how these additives can destroy an engine. What is your take on these, and do you have any recommendations beyond proper tire inflation and driving the speed limit to improve my gas mileage?

A. Over the years, I have tested all sorts of fuel-saving devices and additives — and found none that worked as advertised. Instead, you should have the vehicle checked out just to make sure there isn’t a brake dragging or some other mechanical issue. My advice is to maintain your car, drive the speed limit, and plan your driving as economically as possible. Go easy on the gas and the brakes. With most drivers, if they look carefully at their driving habits, they can easily eliminate 10 to 20 miles off weekly mileage totals. Although not a huge savings, over the course of a year the savings could run around $150 to $200.

John Paul is AAA Northeast’s Car Doctor. He has over 40 years of experience in the automotive business and is an ASE certified master technician. Email your car question to [email protected].