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Report: Gasoline engine has big bang for the fuel-economy buck

A government report says improving the gasoline engine will yield huge gains for the consumer and the environment as automakers consider ways to improve fuel economy over the next 14 years. The Obama administration's technical assessment looked at four technology scenarios by which automakers might attain suggested CAFE goals of 47 to 62 mpg for cars and light trucks by 2025. The scenarios differed by the portion of an automaker's fleet that was accounted for by electrics, hybrid electrics and plug-in hybrid electrics.

Top Gear Tonight: Lexus LFA, SRT, Aston Martin Vanquish, US Road Trip & Mick Fleetwood is SIARPC

Top Gear Episode 2 of Series 19 is on tonight with a U.S. Road Trip with Lexus LFA, Dodge SRT, Aston Martin Vanquish & Mick Fleetwood is SIARPC. The second episode of the new Top Gear series – series 19 – is on BBC2 tonight, and the main feature is a road trip across the USA – this time on the West Coast – with the boys undertaking the usual entertaining nonsense in a trio of supercars.

One Lap of the Web: Mercedes-Benz SLC rendered, Google Glass for the Tesla S and a rusty Datsun 280ZX

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. -- Last month we brought you some intriguing spy photos of a Porsche 911-fighting Mercedes-Benz coupe -- possibly to be called the SLC, or even the next SLS AMG (it's all a bit unclear at this point) -- but layers of camouflage made it a bit tough to see what the car will look like.