The average pickup truck, by its very nature, is a less fuel-efficient vehicle than most cars on the road. This is simply because a truck utilizes a heavier frame, heavy-duty suspension and a body design that's upright and less aerodynamic. Of course, some truck owners wish to adapt or accessorize their vehicles by way of a body or suspension lift. This lifting is often done for aesthetic purposes or to gain greater ground clearance for off-roading. One of the consequences of jacking up the height of the truck, however, is a further decline in gas mileage.
Limit the amount of aftermarket accessorizing for your lifted pickup and/or try to be selective in the type of accessories you add. One of the benefits of jacking up a truck is the ability to fit larger tires and wheels. If possible, though, choose alloy or aluminum wheels rather than steel, as steel wheels will add unnecessary weight. Also avoid adding numerous exterior accessories, such as light bars, roll bars, step bars, winches, hitches or grille guards. Extremely large tires with off-road tread will also diminish fuel economy.
Drive your jacked-up truck at slower speeds when traveling on the highway. Because the truck sits higher off the ground, it encounters more air resistance and drag. This lack of aerodynamics hinders the truck's gas mileage at high speeds. Thus, driving the jacked-up truck at 55 mph or lower will help improve its efficiency.
Avoid using the truck's four-wheel drive whenever possible. Most lifted trucks are four-wheel-drive capable, whether it's at the push of a button or whether you have to lock in the manual hubs. Using four-wheel drive, however, comes at the cost of increased gas usage. Thus, switch over to using two-wheel drive any time you encounter good driving conditions. Four-wheel drive should only be utilized when it's absolutely necessary.
Avoid using your lifted pickup truck for daily errands or multiple, small trips. If you can, opt for a different, more economical household vehicle instead. This way, you'll save both money and gas. Use your jacked-up truck only when necessary or for recreational off-roading.
Check the tires and their alignment. First, make sure the tires are fully inflated. If they're underinflated, your truck will experience a loss in fuel economy. Also, if you've installed larger all-terrain or mud tires, you must make sure they're properly aligned by a professional. If the tires are out of line, you'll also experience diminished fuel mileage.
