Of the seven full-size, heavy-duty diesel pickup trucks Vincentric studied, the Ford F-350 is the only one with five year ownership costs that are lower than that of its gas-powered equivalent.

FORBES: 2012 Ford F-350 Diesel

Ford, for instance, has tied its wagon for the last few years to boosting fuel economy across its spectrum of products, ranging from the new subcompact Ford Fiesta to a line of gas-sipping EcoBoost engines that has even buyers of F-150 pickup trucks grasping for big gains in fuel economy.

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