Safety-Kleen recently hosted an engine teardown event at the headquarters of Outlaw Kustoms in Mooresville, NC, to highlight the performance of its EcoPower recycled and re-refined motor oil in two Cummins 15-liter engines after a million miles of operation in two long-haul Peterbilt 387 tractors owned and operated by Cooke Trucking Co. of Mount Airy, NC.