The 2011 Mack TerraPro with the Cummins Westport ISL-G natural gas engine is certified for the Qualified Alternative Fuel Motor Vehicle Credit, a $32,000 tax credit that can be claimed on buyers' 2010 Federal Business Income Tax filing

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"The tax credit is more welcome than ever for fleets which need to use alternative fuels to meet state or local mandates," said Curtis Dorwart, marketing manager, vocational products. "While natural gas has benefits in some applications, it has a higher acquisition cost for new vehicles than diesel. This helps offset that difference."

Natural gas in either compressed or liquid form burns very cleanly, has abundant domestic supplies and is comparable to diesel in terms of cost over the life of the vehicle, Mack says. The ISL-G-equipped TerraPro model was specifically engineered and built to operate on natural gas, and the engine is installed on the production line at the Mack Macungie Assembly Operations plant. The 9-liter ISL-G is rated at 320 horsepower, can use CNG or LNG, and has a three-way catalytic converter to meet EPA 2010 emissions standards.

More info: www.macktrucks.com