What type of grease for crank shaft?

For lubricating a crankshaft, it's best to use high-quality engine oil rather than grease, as the crankshaft operates in an oil bath and requires a fluid lubricant to ensure proper circulation and cooling. If grease is necessary for specific applications, such as certain bearings or assembly, a multi-purpose lithium-based grease or a synthetic grease designed for high-temperature and high-pressure conditions can be suitable. Always refer to the manufacturer's specifications for the recommended lubricant type.