The terms "fuel-efficiency" and "fuel consumption" are often used interchangeably, but engineers say there's an important ...

Geely's new hybrid powertrain can achieve a 48.4 percent thermal efficiency.

Here are some simple hypermiler tricks to help you increase fuel efficiency as gas prices continue to hover at four-year ...

Fuel economy conversations usually drift straight toward hybrids. That makes sense because battery assistance dominates the mileage headlines. Even so, gasoline-only cars still have a story worth ...