Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Five least-green vehicles

We are a generation seemingly obsessed with the environment, eager to cover our carbon footprints in any way possible--or at least give off a green vibe visible to our neighbors). And though many car buyers are jumping on the hybrid and electric bandwagons, the majority of us still crave brute-power cars and trucks. While being environmentally friendly is nice, there comes a time when you just have to be mean -- eco-mean, in this case.

Mazda refines lineup with SkyActiv technology

It turns out Mazda isn't simply shooting for the sky. Rather, the protagonists of zoom-zoom driving dynamics are taking an active approach to the brand's DNA: Put it all together, and it's called “SkyActiv.” Mazda is billing the suite of technologies as the pillars of its way forward. Much of these features--which enhance future products in nearly all areas including engine, transmission and chassis--have already been revealed.

Cadillac 2014 ELR [w/Gallery]

Cadillac unveils the 2014 ELR today at the North American International Auto Show. The new luxury coupe is almost unchanged from the Converj Concept - unveiled at the 2009 NAIAS - upon which it is based and features Cadillac's signature vertical headlamps and rear lamps. The flush fascia and grille – with active shutters behind the grille opening – combined with tapered fascia corners and a raked windshield mean that drag is reduced to 0.305.