What Are the Types of Winter Engine Oil?
2 Answers
Winter engine oil is classified with the 'w' designation, primarily consisting of 6 types. The classifications and main functions of winter engine oil are as follows: Winter engine oil classifications: 0w, 5w, 10w, 15w, 20w, 25w. Main functions of engine oil: Reduce friction between the cylinder liner, piston rings, and camshaft; form a seal between the piston rings and pistons to minimize gas leakage and prevent the entry of external contaminants; adsorb onto the surfaces of parts to protect against contact with water, air, acidic substances, and harmful gases; alleviate the load on pistons, piston skirts, connecting rods, and crankshaft bearings; and clean away carbon deposits, sludge, and worn metal particles from engine parts through the flow of lubricating oil.
As a seasoned driver from northern China, I often research engine oil grades before the harsh winter season. There are several common winter oil grades: 5W-30 is the most versatile, suitable for temperatures around -25°C; 0W-20 is specifically designed for extreme cold regions, maintaining fluidity below -30°C; 10W-40 works better in warmer southern areas; while 15W-40 is for mild winters. The smaller the number before the W, the better the low-temperature fluidity - this is crucial for cold engine starts. I remember last early winter when I used the wrong grade (10W oil), my car struggled to start at -15°C with engine knocking sounds during ignition. Switching to 5W-30 immediately solved the problem. Synthetic oils perform better in winter with faster flow to protect engine components. I strongly recommend changing oil before winter and checking your vehicle manual for recommended grades to prevent premature wear. Developing this habit can significantly extend your car's lifespan.