California could soon close one of the dirtiest diesel-emissions loopholes

Fitzgerald Glider Kits headquarters in Crossville, TennesseeWe’ve all seen it while following big rigs: Clouds of sooty smoke coming from a single truck, prompted by an uphill grade, a passing maneuver, or sometimes seemingly nothing at all. How can that be legal? It might not be legal, but it underscores a current loophole in U.S. emissions for larger (Class 4-8) trucks: There’s no mechanism...

Prototype Sumitomo tires recover energy as they roll

Sumitomo electricity-generating tire conceptThere's wind power, solar power, and—tire power. Sumitomo Rubber is developing a new tire that can restore energy to a car as it drives down the road. The energy recaptures static electricity generated when the tires deform and return to their original shape as they roll down the road. Recovering energy from a portion of tire rolling...

2020 Chevrolet Silverado diesel tops pickup truck mpg race

2020 Chevrolet Silverado 3500HDFuel economy in pickups matters. And General Motors just announced record-setting new EPA fuel economy ratings for its new 2020 Chevrolet Silverado light-duty pickup powered by its new 3.0-liter inline-6 turbodiesel. The 2020 Chevy Silverado 1500 diesel is rated at 23 mpg city, 33 highway, and 27 mpg combined for two-wheel drive models with the...

2020 Chevrolet Silverado diesel tops pickup truck mpg race

2020 Chevrolet Silverado 1500 dieselFuel economy matters in pickups. General Motors announced new EPA fuel economy ratings Thursday for its 2020 Chevrolet Silverado light-duty pickup powered by its new 3.0-liter inline-6 turbodiesel. The 2020 Chevy Silverado 1500 diesel will rate 23 mpg city, 33 highway for two-wheel drive models with a 10-speed automatic transmission, Chevy said...

Tesla CTO and battery mastermind JB Straubel exits

Tesla CTO JB Straubel and CEO Elon Musk presenting at gigafactory tour, Reno, Nevada, July 2016At the start of a call Wednesday to provide guidance on Tesla’s record sales but $408 million loss in the second quarter, Tesla CEO Elon Musk dropped a bombshell: that its chief technical officer, JB Straubel, will be stepping down from his executive post. Drew Baglino will take over most of the responsibilities held by Straubel, who will be...

Two-speed transmission for EVs could make a comeback.

Tesla Roadster Prototype for sale on eBayIt's been a long time since any production cars have used 2-speed automatic transmissions. With a new 2-speed transmission for electric cars, German supplier ZF Friedrichshafen is turning back the page on EV development. The clutchless 2-speed transmission Tesla attempted to use in the original Roadster found notoriety for the lengthy delay of...

Automakers rebuff EPA mpg rollbacks, cut side deal with California

TrafficSome of the largest automakers in the U.S. have banded together with California—to set an example for the EPA and its long-stalled emissions and fuel economy revamp. The agreement between Ford, Honda, Volkswagen, and BMW's U.S. division would raise fuel-economy standards by about 3.7 percent a year through 2026 to a final target of about 50...