An engine has several parts that move and rub against each other during the manoeuvre, and the friction force produces heat. The function of the oil is to lubricate the engine, absorb heat, and ensure efficient operation of the internal parts without them heating up. This protects against wear and corrosion, strengthens the seal, ensures the cleanliness of the engine and limits friction to ensure maximum engine longevity.
As the engine oil loses its efficiency, it prevents it from lubricating the engine properly, removing contaminants and absorbing heat, so it must be drained. The oil has five main functions to your engine. It does much more than just lubricate. One last recommendation: winter is an ideal time for the use of synthetic oil because it facilitates the start in cold weather.