The new 3.0-liter supercharged V-6 engine and eight-speed automatic transmission that were introduced to the LR4 lineup this past year made this model considerably more fuel-efficient than before. But don't expect this boxy, heavy SUV to be something that it's not.
EPA fuel economy ratings for the 2015 LR4 stand at 15 mpg city, 19 mpg highway; that's a huge improvement over the 12/17 mpg ratings of just a couple model years ago, when it was powered by a V-8 and six-speed automatic.
The LR4 also now comes with Intelligent Stop/Start, which uses a special twin-solenoid starter to shut the supercharged V-6 off at stoplights, to avoid prolonged idling when it's not needed, then starts it back up the instant you let up off the brake. The feature helps the LR4 get better mileage in real-world stop-and-go commuting conditions.