Thomas Built Saf-T-Liner® C2 CNG school buses, fitted with the Cummins Westport ISB6.7 G 6.7 liter natural gas engine, have been purchased by a second U.S. school district. Blue Springs R-IV School District, located in Blue Springs, Missouri, has purchased 19 compressed natural gas (CNG) powered units. “Over the past 13 years, our … Continue reading Second U.S. School District Selects Thomas Built CNG Buses