Cooling effect
Cooling effect is one function of engine oil.
The temperature inside the engine combustion chamber is
extremely high.
Engine oil lubricates piston sliding parts and carries heat away
to provide cooling while preventing seizure and high-temperature
oxidation of the oil itself.
In this way, cooling effects are one of the most important
functions of oil, in that, if the viscosity of the oil is too
high or amount of oil supplied is too low, it may cause burning
due to insufficient cooling.
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