During the course of our testing, the Bully Dog WatchDog proved to be alternately simple enough for a novice to use and complex enough for our car geek tastes. It'll help you boost your fuel economy within reasonable limits, but don't expect it to be an mpg magic bullet.
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Spare tires and inflator kits are vastly different technologies, each with benefits and drawbacks.
The 2015 Toyota Camry Hybrid features a whole new look, and carries over its excellent gasoline-electric drivetrain.
The mid-size truck captured top fuel-sipping honors away from Ram's full-size EcoDiesel.
The automaker could face even more fines if its diesel vehicles can't meet both US fuel and emissions standards.
Citroen modifies its C4 Cactus model with a new, hybrid drivetrain and aerodynamic features to achieve 2-liters of fuel usage per 100 kilometers.
A diesel engine option adds decent fuel economy to the Jeep Grand Cherokee's impressive roster of capabilities.
The solutions likely won't be the same in the US, but VW is making progress in Europe to remedy its emissions scandal.
Toyota's littlest crossover goes big on fuel economy, thanks to the inclusion of a hybrid-electric drivetrain. All RAV4 models have been upgraded for 2016 with a mild aesthetic refresh, as well.
Whether it's the first cordless kettle or a spacecraft for civilians, UK design company Seymourpowell has long created inventions on "the edge of the future." But how do you design a world that doesn't exist yet?