The search for improved fuel economy and reliability were the key reasons Matthews Transport selected the 15-litre Cummins ISXe5 in 2013 as its standard engine brand. Based at Kojonup in a rich pastoral district 260 km southeast of Perth in Western Australia, the company is currently operating 14 ISXe5 engines in a mix of Freightliner Argosy and Kenworth K200 prime movers. The company, which had its origins in the early 1930s and now spans four generations of the Matthews family, hauls mainly grain, liquid and bulk fertilizer, and livestock. Company-owned trucks total 15 but the fleet can swell to 40 units and more when subcontractors are called in to move livestock. It’s not unusual for Matthews to move over 100,000 head of export sheep in one hit from the feedlot at Kojonup to Fremantle port.