ClearFlame Engine Technologies has taken the next in step in development of its proprietary technology designed to enable heavy-duty diesel engines to operate on 100% renewable plant-based fuels. In December, the company began its initial road testing, a critical milestone in its objective to decarbonize generators and other engines. “This demonstration proves the workability of our technology that takes the dirty diesel fuel out of engines and trucks,” said BJ Johnson, CEO and co-founder of the Geneva, Ill., headquartered company. The demonstrator vehicle for ClearFlame’s engine technology is a15 L Cummins X15 diesel engine rated 500 hp. The engine was retrofitted with ClearFlame’s technology to operate on E98 ethanol.