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Gasoline engine oil is a type of lubricant specifically formulated for spark-ignition internal combustion engines that run on gasoline or petrol. It is designed to reduce friction and wear between moving parts, clean and protect engine components, neutralize harmful acids, cool the engine, prevent corrosion, and improve fuel efficiency. Gasoline engine oil plays a crucial role in maintaining the performance and longevity of automotive engines, whether they are in cars, trucks, or other vehicles that use gasoline as fuel. Its properties include viscosity, volatility, detergency, dispersancy, anti-wear additives, antioxidants, and inhibitors for rust, foam, and corrosion. Gasoline engine oil comes in various grades, such as SAE 5W-30, 10W-40, or 20W-50, depending on the climate, driving conditions, and manufacturer's recommendations. It can be made from mineral, semi-synthetic, or synthetic base oils, with additives to enhance its performance and protection. Gasoline engine oil is typically changed at regular intervals, as specified by the vehicle manufacturer, to ensure optimal engine health and functionality.