Castrol MHP 153 and 154 are high performance lubricants specifically developed for use in modern highly rated marine and power generation four-stroke engines operating on distillate fuels. MHP 153 and 154 are suitable for use in medium to highly-rated marine trunk piston engines operating with ISO 8217 type DMA/DMZ/DMB/RMA10 fuels and requiring API CF performance. MHP 153 and 154 have high load carrying capabilities and superior gear performance that enable them to be used as a common oil for both engine and transmission systems.