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Concept Car of the Week: Buick Y-Job (1938)

Welcome to the first in a new, regular, series of features in which we highlight an important, forgotten or just plain cool concept car each week. Concept cars have thrilled and inspired for decades, testing the limits in terms of technology and design and shaping the ways cars are designed today. They're the pinnacle of our art and probably the thing that first piqued your interest in car design.

Mazda 6 (2012) revealed in teaser images

Mazda has released shadowy teaser images of its new 6 saloon, in anticipation of its world premiere at the Moscow motor show, running from 29 August - 9 September 2012. The car's nose is very similar to the Takeri concept of 2011, continuing the new Mazda family face first seen in production trim on the new Mazda CX-5 crossover. The new 2012 Mazda 6: all the details Like the CX-5, the new Mazda 6 will benefit from Mazda's 'SkyActiv' technology. SkyActiv brings a lightweight modular architecture and a range of cleaner petrol and diesel engines – which Mazda claims are nearly as frugal as hybrids without a bulky EV battery in sight.

NHTSA report: Audi S8 tops 2009 theft rates

The Audi S8 and the Toyota Camry stood out among the most stolen 2009 passenger vehicles in a report from the National Highway Traffic Safety Administration. The just-released report tracked theft rates for all new 2009 passenger vehicles stolen that year. It excludes most SUVs and pickups, so the Cadillac Escalade won't make this list.