34.3mm Freeze Plugs Center Marked on 2040-parts.com

Tax-return car deals

Automakers are offering cut-rate financing, cash back and lease deals just as our income-tax-refund checks are coming in the mail. These timely tax-return car deals are paired with the necessity for automakers to make room on dealer lots for all-new models. (See the Cadillac CTS deals.) Here, we break down some of the incentives being offered this month.

Porsche Panamera plug-in hybrid set for 2014

Porsche AG will build a plug-in hybrid version of the Panamera sedan starting in 2014, sources familiar with the situation said last week. The plug-in hybrid likely will come to the United States, but the timing is unclear, a source said. Volkswagen AG, which owns 49.9 percent of Porsche's sports car business, will roll out plug-in hybrid versions of the Audi Q7 crossover and European-sold VW Passat starting in 2014 or 2015, a source said.

Heifer fuel

Unlike most people, when Michael Doyle drives past a herd of cattle grazing in a field, he doesn't see future tenderloins or T-bones. He sees fuel. The company Doyle co-owns, North Star Biofuels, is about to start production of biodiesel at a new $15 million, 20,000-square-foot plant in Watsonville, Calif., about 60 miles south of San Francisco.