Hyundai-Kia is the greenest automaker in the U.S., according to the Union of Concerned Scientists. The group ranked the top eight automakers based on carbon and smog-forming emissions of their 2013 model-year fleets. This was the first time since the first report in 1998 that all eight reduced pollution. Smaller turbocharged engines and the introduction of hybrid versions of the Sonata and Optima (shown) helped propel Hyundai-Kia to the top spot. Honda, which had been No. 1 since 1998, came in second. Toyota, Nissan and Volkswagen tied for third place.
— The Associated Press
Impala adds stop-start
The four-cylinder 2015 Chevrolet Impala (shown) will include stop-start technology when it goes on sale this summer. The technology, which shuts off the engine during traffic stops, is expected to improve city fuel economy by almost 5 percent, to 22 mpg, says General Motors. In highway driving, it will get 31 mpg. The V-6 version won't have stop-start.
— NWautos staff