How often should mineral motor oil be changed?

[DelBethany]

Mineral motor oil should be changed every 5,000 kilometers or 3 months. Mineral oil is a lubricant refined from petroleum, with its base oil being the residual bottom-of-the-tower oil left after the distillation of useful light substances during crude oil refining. The functions of motor oil are: 1. To cushion the impact load on pistons, piston pins, connecting rods, and crankshaft bearings; 2. To form a seal between the piston rings and pistons, reducing gas leakage and preventing the entry of external contaminants. Precautions for changing motor oil include: 1. Perform the change when the engine is warm to ensure the old oil is drained as thoroughly as possible; 2. Add new oil and ensure the amount is appropriate; 3. After adding oil, start the engine and check all components for leaks. Run the engine for 3 minutes to confirm the oil level is at the normal mark.