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July 17: A mystery and a helping hand

Driving very conservatively, at about 55 mph, I made it the 76.3 kms (47.3 miles) using only 9 kWh. That's 5.25 miles per kWh. That's also 8.5 kms per kWh.

Future products: Mazda's new direct-injection engine family arrives in 2011

The big news at Mazda is a new family of direct-injection gasoline and diesel engines that will start to arrive in 2011. Mazda will make significant changes to vehicle platforms to accommodate the Sky engines, which will be more powerful and fuel-efficient at lower displacements than the company's current engines. The first Sky gasoline engine is expected to debut in the United States in 2011.

Chrysler 300 gets luxury upgrades

The Chrysler Group rolled out its latest entry for the lucrative "black car" market on Tuesday, revealing new "Luxury Series" editions of its flagship Chrysler 300 sedan that add new interiors to recent powertrain additions. The new versions feature leather-wrapped interior components. The vehicles also have heated steering wheels with special die-cast paddle shifters and wood trim, according to a Chrysler statement.