Mack to introduce natural gas versions of two trucks in 2013

GREENSBORO, N.C. — Mack has announced it will be offering natural gas-powered versions of its Pinnacle and Granite models in 2013. Both models will utilize the Cummins Westport ISX12 G engine. Customer testing is scheduled to begin this year….

May Sees Big Uptick in DEF Pump Prices

The average U.S. DEF pump price rose 7 cents to $2.81 per gallon between April and May, according to DEF Tracker. This is the biggest price movement since October 2011.