More efficient than ever: The innovative basis for the newly developed 9.5 l four-valve six-cylinder in-line E18 engine is the D15 diesel engine introduced in 2018. Thanks to its downsizing ingenuity, MAN was able to achieve higher torque while reducing displacement. This saves enormously on fuel. And that's not all. The newly developed exhaust gas recirculation in combination with a 3-way catalytic converter for exhaust treatment enables emissions to be significantly lower than the required Euro 6 emissions limits.