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

One Lap of the Web: Porsche 959s, the Alfa Romeo 4C and the Mercedes-Benz A45 AMG vs. the BMW M135i

We spend a lot of time on the Internet -- pretty much whenever we're not driving, writing about or working on cars. Since there's more out there than we'd ever be able to cover, here's our daily digest of car stuff on the Web you may not otherwise have heard about. -- When initially produced to satisfy FIA homologation requirements in 1986, the Porsche 959 was the world's fastest street-legal production car.

Nissan Leaf gets battery warranty boost

Nissan Motor Co. plans to bolster the warranty of the battery module in its electric Leaf to reassure consumers of its durability. The company intends to notify current owners and dealers early next year that it will make the warranty retroactive to cover all existing Leafs, offering to repair or replace the car’s lithium-ion battery if it loses more than 30 percent of its ability to hold a charge after five years or 60,000 miles.

Detroit auto show 2012 - a video review of the NAIAS

It's CAR's traditional three wise-ish men in a car video review of the 2012 North American International Auto Show. Hear the analysis from our European editor Georg Kacher, contributing editor Ben Oliver and anchorman associate editor Tim Pollard, as they chew over the new cars, surprises, delights and disappointments from the Detroit auto show. NAIAS 2012 was a more sober affair than the previous era of showmanship; there were no herds of cattle being steered down Detroit's streets or wild parties hosted by Chrysler in the old Firehouse.