2016 Industry Oil Tulsa 
Green Car Congress
JULY 17, 2016
Purpose-built for the school bus industry, the CE Series with PSI propane engine is designed to provide diesel-like performance with higher torque at lower engine speeds. Minimal revving reduces engine wear, oil usage and maintenance, while increasing durability and efficiency. liter LP propane engine.
Green Car Congress
SEPTEMBER 2, 2014
Purpose-built for the school bus industry, the CE Series with PSI propane engine is designed to provide diesel-like performance with higher torque at lower engine speeds. Minimal revving reduces engine wear, oil usage and maintenance, while increasing durability and efficiency. bus assembly plant in Tulsa, Okla. liter engine.
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