Lubrication: It forms a protective coating that prevents metal surfaces from rubbing against each other, especially in high-stress areas, which could otherwise cause rapid engine wear and breakdown.
Cooling: Motor oil supports the engine’s primary cooling system by circulating through parts like the crankshaft, bearings, pistons, and other components, helping to dissipate heat.
Cleaning: The oil contains detergents and dispersants that remove contaminants such as dirt, grit, and unburned carbon, keeping the oil lines clear for efficient lubrication.
Suspension of Impurities: These contaminants are held in suspension by the oil, allowing the filter to absorb them and keeping the engine parts clean. This is why motor oil turns dark as it absorbs impurities.
Sealing: Motor oil fills gaps in the cylinder wall and piston rings, creating a seal that reduces oil consumption and prevents blow-by gases from entering the combustion chamber.
