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

A look at Cadillac future products

General Motors has green-lighted the development of a large flagship sedan for Cadillac, sources say, part of its plan to position its luxury brand's lineup to take on the German luxury stalwarts in every key sedan segment. The flagship sedan is to be built on a new rear-wheel-drive platform and arrive by 2015. The long-rumored rwd flagship would challenge the BMW 7-series and Mercedes-Benz S-class and is a key to GM's ambitions to expand Cadillac in China.

Nissan tests self-cleaning paint

Well that took long enough. Nanotechnology is here, and Nissan is reportedly using it in the paint on its little Versa Note hatchback. We would have started on something a little more exciting, like the hard-to-care-for matte finish on the GT-R's rear spoiler, but that's just us.

The AutoWeek list: Foolish cars we should never have bought, but did

2001 Pontiac Aztek Our take: The most recent black eye to the General's style department. A car equivalent of the ubiquitous camel design, put together by a committee whose members obviously didn't speak to each other. 1999 Isuzu VehiCROSS Our take: We don't doubt this Japanese ute's off-road prowess, but its goggle-eye front and corrugated steel door ripples were enormous design miscues.