+Engine oil is a vital fluid, circulating within an [engine](/wiki/engine) to minimize friction and wear between moving parts. It forms a protective film, ensuring smooth operation, cooling, and critical [lubrication](/wiki/lubrication) for longevity.
+## See also
+- [Oil](/wiki/oil)
+- [Viscosity](/wiki/viscosity)
+- [Motor vehicle](/wiki/motor_vehicle)
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