What is the oil grade for winter?

[LeBrayden]

Winter oil grades are denoted by 'w', including 0w, 5w, 10w, 15w, 20w, and 25w. The functions of engine oil are: 1. To reduce friction between the cylinder liner, piston rings, and camshaft; 2. To form a seal between the piston rings and pistons, minimizing gas leakage and preventing external contaminants from entering; 3. To adhere to component surfaces, protecting them from contact with water, air, acidic substances, and harmful gases; 4. To alleviate the load on pistons, piston skirts, connecting rods, and crankshaft bearings; 5. To flush away carbon deposits, sludge, and worn metal particles from engine components through the flow of lubricating oil.

[LaNora]

Back when I used to tinker with car repairs for fun, I did some research on winter engine oil. The key to oil grades lies in those numbers. For instance, in 5W-30, the 'W' stands for winter, and the first number '5' indicates low-temperature fluidity. In winter, the smaller this number, the better – ideally 0W-20 or 5W-30. This ensures smooth engine starts in subzero conditions without prolonged cranking. Using the wrong oil, like thicker 10W-40, can cause engine hesitation in cold weather and damage both the battery and engine. I remember last year when I switched to 0W-20 oil – my car started effortlessly on -10°C mornings in Beijing. Always check the grade label on oil bottles when inspecting your vehicle. Regular oil changes are a smart preventive measure to avoid roadside breakdowns. Consult your owner's manual religiously and use only the specified oil – this isn't an area to cut corners. Long-term use of correct oil extends engine life, reduces repair costs, and delivers real savings.

[McRicardo]

In the freezing winters up north, choosing the right engine oil grade is crucial. I always go for 0W oils like 0W-20 because they don’t thicken up at -25°C and flow quickly for easy engine starts. 5W-30 works too but has slightly worse cold resistance. Once I used the wrong oil and my car refused to start in the early morning, making me late. After switching to thinner oil, no more worries. Check the 'W' number on the bottle—the smaller, the better—to ensure smooth oil flow in the cold. Don’t neglect seasonal maintenance; switch to winter oil two weeks ahead, either at a shop or DIY, to protect your engine from wear. It even saves fuel—don’t let small oversights cause big trouble. Remember to check your car’s manual for recommended grades based on your specific model.

[Arianna]

For winter, engine oil grades like 5W-30 or 0W-20 are suitable. The smaller number before the 'W' on the oil bottle is better for cold starts, as thicker oil makes the engine harder to turn. My car is brand new, and the manual specifies 0W-20 as standard, which works perfectly for smooth operation in winter. Regularly check the oil level; don't wait until the warning light comes on to panic. Simply put, choose these grades during oil changes to avoid the car struggling to start. I recommend following the manual—it's hassle-free and protects your car best. Avoid using higher-grade oil; it's risky.