Cummins Retunes ISX11.9 for Better Economy, Renames It ISX12
By Tom Berg, Senior Editor Engineers at Cummins have retuned their-heavy duty ISX11.9 diesel for better performance and fuel economy, and marketers have stepped up promotion of the engine by renaming it the ISX12. Recalibrating… Read More »Cummins Retunes ISX11.9 for Better Economy, Renames It ISX12