Is October Too Early to Change to Winter Engine Oil?

[VonMarcus]

It is acceptable to change to winter engine oil in October, but it should not be later than November. Engine Oil Grade: Since winter temperatures are relatively low, the low-temperature fluidity requirements for engine oil are higher. It is recommended to use engine oil with a grade below 5W, as it can effectively prevent freezing. Generally, engine oil with a "W" designation is for winter use. The number before the "W" represents the oil's low-temperature fluidity—the smaller the number, the lower the freezing point, the better the cold resistance, and the better the low-temperature fluidity. Proper Warm-Up: When changing oil in winter, if the engine is cold, the oil's fluidity will decrease due to low temperatures, making it difficult to drain the old oil completely. In this case, the engine should be warmed up appropriately. When the oil reaches a certain temperature, its viscosity decreases, fluidity improves, and it softens the sludge inside the engine, allowing it to be discharged along with the old oil.