diesel fuel. Fact: Our SCR system works better due to copper zeolite technology. Fact: Driver satisfaction and productivity are better due to improved performance of Cummins engines with SCR. Fact: Reliability and uptime are better. Fact: Every 2010 Cummins engine is backed by the biggest and best support network in the industry. To get all the facts about Cummins engines for the bus market, visit cumminsengines.com. To get the better performance you deserve, spec Cummins. Every time.