Abstract
Due to the existing and coming environmental legislation on fuel sulphur contents MAN B&W two-stroke engines will increasingly operate on distillate fuels, marine gas oil (MGO) and marine diesel oil (MDO), in such areas where demanded.MAN B&W two-stroke engines are optimised to operate on heavy fuel. The MGO / MDO fuels can be used, however, some individual considerations on the Engine and fuel system have to be done to ensure safe and reliable performance.Traditionally, the lowest viscosity suitable for large marine diesels has been set at 2 cSt at engine inlet, however experience has shown us that the most reliable performance is achieved with viscosities above 3 cSt at engine inlet.Fuels with a specified viscosity of minimum 2 cSt at 40 deg C can be used, however as many factors influence the performance operating on fuels in the low viscosity range, MAN Diesel believes that fuels with a viscosity of 3 cSt at 40 deg C hold the sufficient margin for safe and reliable engine performance
