Navistar International says third-party testing has proved that its ProStar+ tractor with a 2010-legal MaxxForce 13 diesel is more efficient than two major competitors when both fuel and diesel ...

Putting a new cost-efficiency measure—“fluid economy”-- into play, Navistar Inc. announced yesterday that independent third-party testing has proved its International ProStar+ tractor powered by its ...

Pricing for diesel exhaust fluid (DEF) followed slightly divergent paths between February and March this year, with DEF prices at the pump falling by a penny per gallon while bulk tote prices actually ...