Crankshaft

A crankshaft arrangement comprising:

• a crankshaft comprising:
• a plurality of main journal bearing surfaces,
• a plurality of connector rod bearing surfaces, and
• at least one oil feed passageway internal to the crankshaft, each of the at least one oil feed passageways communicating with an inlet and a plurality of outlets located within bearing surfaces,
• wherein the inlet is located within a first main journal bearing surface, and at least one of the outlets is located within a second main journal bearing surface;
• and
• a plurality of bearing shells disposed corresponding to the main journal bearing surfaces and at a gap from each of the main journal bearing surfaces, wherein each bearing shell corresponding to the main journal bearing surface having the inlet has an oil supply slot, wherein an oil supply channel is provided in a bearing housing that houses each bearing shell having the oil supply slot, wherein the at least one outlet in the second main journal bearing surface is arranged such that oil exiting said at least one outlet enters the gap, and wherein the at least one oil feed passageway is configured to supply oil to an outlet in a first, connector rod bearing surface that is connected to the oil feed passageway intermediate the input in the first main journal bearing surface and the at least one output in the second main journal bearing surface.