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Nissan previews Resonance Detroit show concept

Nissan has teased its Resonance crossover concept ahead of its official debut next week in Detroit. The image of the concept, which Nissan says is the latest in a series of crossover designs "fusing bold styling with a hybrid-electric powertrain," shows a sharp flowing character line running along the side as well as the L-shaped LED rear lamps that can be found on the Nissan Juke. We can also see that the Resonance features a floating roof, created by the C-pillar not joining up to the roof but curving down to leave a break to the roof, giving the impression that it is floating over the rear window.

Exotic Cadillac XTS mule spotted

Autoweek reader and frequent spy-photo contributor Spencer Abbott brings us these photos that he took last weekend in Birmingham, Mich. The photos clearly show a heavily camouflaged Cadillac XTS. But given that production-ready examples of Cadillac's new full-sizer have been making frequent appearances on Michigan highways for months, the heavy camo on this XTS is a bit puzzling.

Mazda's rotary engine stalled, not forgotten

Development of the next-generation rotary engine from Mazda Motor Corp., first unveiled three years ago, is making slow progress despite missing emissions targets. A top Mazda powertrain executive said today that the 1.6-liter rotary engine, called the 16X, is about 30 percent more fuel-efficient than the current rotary engine used in the RX-8 sporty car. In fact, the 16X so far performs slightly better than Mazda's standard two-liter gasoline engine, said Mitsuo Hitomi, general manager of the Japanese carmaker's powertrain division.