Is 0W or 5W engine oil better?

[VanIsabelle]

Here is an introduction about whether 0W or 5W engine oil is better: 1. The difference between the two: Both 0W and 5W engine oils are winter-grade oils, but they differ in low-temperature viscosity, which refers to low-temperature fluidity. 2. Letter representation: 'W' stands for 'Winter' in English, and the number before 'W' indicates the oil's low-temperature fluidity. The smaller the number, the lower the low-temperature viscosity of the oil, the better the fluidity, and the more resistant it is to low temperatures. 3. Fluidity: The difference between 0W and 5W engine oils lies in the fact that 0W has better low-temperature fluidity than 5W. 4. Low-temperature resistance: 0W and 5W engine oils also differ in their low-temperature resistance. Generally, 0W oil can withstand temperatures as low as -35°C, while 5W oil can only withstand temperatures down to -30°C. Since engine oil becomes more viscous as the temperature drops, it increases the resistance during engine startup. If oil with poor low-temperature fluidity is used in extremely cold conditions, it may result in weak engine startup or even failure to start.

[LeHarley]

I grew up in Heilongjiang, where temperatures of -20 to -30 degrees Celsius in winter are common. Having driven several older and newer cars, I feel that choosing 0W oil is a lifesaver—cold starts are much smoother compared to 5W, which can freeze the engine. 0W flows better in low temperatures, ensuring the engine starts immediately, reducing battery strain and mechanical wear. If you live in a warmer area, 5W is sufficient and more cost-effective. Remember to check the oil viscosity rating: the smaller the number before the W, the better the cold resistance, and it also saves a bit on fuel. Regular maintenance, including frequent oil filter changes and proper low-temperature protection, ensures safer driving, especially during early morning trips when safety comes first.

[SarahAnn]

I've been driving an SUV to commute and take my kids around for years, not really fussing about high-tech stuff. Let's talk about choosing between 0W and 5W engine oil. 0W is suitable for cold winter areas, making the engine run smoothly right from startup and protecting the vehicle; 5W is quite hassle-free in mild climates and might be a bit cheaper. The key is to check what the car manual recommends—don't randomly switch types, as different cars have different requirements. My neighbor used 5W in the south without issues, but struggled to start the car in the north. It's advisable to use 0W when temperatures drop below freezing, and always keep emergency tools handy for unexpected situations. Oil quality also matters, as poor quality can affect engine lifespan. Checking the oil condition before driving is a good habit.

[DeGrant]

I prioritize environmental protection and cost savings. After switching to an energy-efficient car, I started using 0W oil, which flows faster at low temperatures, helping reduce fuel consumption and emissions. 0W performs more efficiently than 5W in cold weather, with less engine resistance for smoother operation. In warmer seasons, 5W is also acceptable—it has slightly higher viscosity but lower cost. Always check the manufacturer's guidelines before choosing; many new cars use 0W20 formulations to reduce emissions. Avoid arbitrary oil changes, as incorrect usage may increase fuel consumption or cause engine issues. Pair it with regular maintenance to extend oil life, and drive smoothly with gradual acceleration to protect both your car and the environment.