
ROUSH CleanTech will begin offering a medium-duty engine powered by a propane autogas that's 75% cleaner than the current emissions standard and has been approved for use by regulators, according to the company.
The Livonia, Mich.-based vehicle modifier will also make the engine available for Blue Bird buses. The engines have been certified by the Environmental Protection Agency and California Air Resources Board and emit a nitrogen oxide (NOx) level of 0.05 grams per brake horsepower per hour.










