The differences between gasoline and diesel engines lie not only in their fuels, but in how those fuels are ignited. Gasoline engines use spark plugs, while diesels simply use compression. But it is possible to ignite gasoline in an internal-combustion engine with compression, as in a diesel. DON'T MISS: Mazda diesel to arrive fall 2017 in new... Mazda to launch homogeneous-charge compression engine next year
The differences between gasoline and diesel engines lie not only in their fuels, but in how those fuels are ignited. Gasoline engines use spark plugs, while diesels simply use compression. But it is possible to ignite gasoline in an internal-combustion engine with compression, as in a diesel. DON'T MISS: Mazda diesel to arrive fall 2017 in new... 
Since Ford launched its line of downsized EcoBoost engines in 2009, the "eco" part of that name has often required an asterisk. That's because some owners have found that real-world fuel economy results don't always live up to the vehicles' official EPA ratings. The phrase "you can have Eco, or you can have Boost, but you can't have both at the... 
For nearly a decade, the average fuel economy of new cars sold in the U.S. steadily increased—but that moment has stalled in recent years. Low gas prices and increased consumer interest in SUVs has caused new-car average fuel economy to plateau and, in the case of 2016's figures, decline slightly. The average fuel economy of new cars sold in... ![Elio Motors 84 mpg 3-wheeler [Image: Elio Motors]](http://images.hgmsites.net/tmb/elio-motors-84-mpg-3-wheeler-image-elio-motors_100477636_t.gif)
Three-wheeled vehicles have never been remotely popular in North America, but some new makers of these unusual vehicles are hoping for a resurgence of interest. Falling into a gray area between cars and motorcycles, production-ready electric and gasoline 3-wheeled vehicles have been wheeled out by several companies promising deliveries in the near... 
The Mitsubishi Mirage is the underdog of small cars: slow, loud, and archaic, but scrappy. And it's been a much bigger sales success than Mitsubishi expected, given the small numbers of minicars and subcompacts sold in the U.S. these days. For 2017, Mitsubishi added a four-door sedan model dubbed G4 to the existing five-door hatchback, and gave... 
When it comes to regulations governing the auto industry, the Obama administration does not plan to go gentle into that good night. The outgoing administration has pushed through a number of new regulations, some related to fuel efficiency, before President-elect Donald Trump takes office next month. The move is likely a hedge against the incoming... 
It's well known by now that the European Union testing protocol for fuel economy is much less rigorous than the U.S. Environmental Protection Agency (EPA) standards. Both protocols are based around laboratory testing rather than real-world evaluation, but EU figures have gained a reputation for being much more optimistic than what drivers can... 
While diesel vehicles have received a black eye in the form of the Volkswagen emissions scandal, they often still deliver better fuel economy than comparable gasoline models. But does a lower volume of fuel consumed necessarily translate into lower ownership costs? Various cars, SUVs, and pickup trucks sold in the U.S. are offered with...