What is the applicable scope of engine oil grade 0w40?

[SanEmma]

Engine oil grade 0w40 is suitable for cars with high oil viscosity and large displacement. The following is an introduction to the applicable scope of engine oil grade 0w40: Introduction: The W in 0w40 stands for Winter, and the smaller the number before it, the better the low-temperature fluidity of the engine oil, indicating a lower usable ambient temperature and better protection for the engine during cold starts. The number 40 indicates that the kinematic viscosity standard at 100 degrees Celsius is between 12.5m㎡/s and 16.3m㎡/s. Meaning: The number before W represents the flow performance at low temperatures. The smaller the number, the better the starting performance at low temperatures. The number after W represents the stability of the oil at high temperatures (i.e., the likelihood of thinning). The larger the number, the better the stability of the oil at high temperatures.

[VanArianna]

I think 0W40 oil is particularly suitable for places with significant weather changes. For example, I've been driving in the north for several years, where winters are extremely cold, with temperatures dropping to dozens of degrees below zero, making it hard to start the car. But with 0W40 oil, it starts easily because of its excellent low-temperature fluidity. During summer highway driving, when the engine temperature soars, the 40 high-temperature viscosity ensures stable protection for the engine, preventing damage to parts. It suits most cars, including my German car and my friend's Japanese SUV, with fewer issues even after long-term use, making it more worry-free than single-grade oils. Just make sure to choose genuine products—don't skimp on this expense. With good oil, you can drive worry-free for months after each change. I always advise car owners to follow the manual for regular oil changes and avoid using other grades randomly.

[MacOlive]

I drive a family car for commuting and often hear other car owners discussing engine oil issues. 0W40 has a wide range of applications. In hot cities or during long-distance driving, it maintains viscosity without breaking down under high engine temperatures, protecting pistons and bearings to prevent premature wear. It also ensures quick starts in cold conditions, especially in regions below zero degrees, making it comfortable to use. It's suitable for high-performance cars or those with turbochargers, providing smoother acceleration, but regular cars can use it too—don’t believe the myth that it’s only for European cars. Personally, I’ve noticed reduced engine noise and no significant increase in fuel consumption. Just remember to stick to the maintenance schedule—delaying oil changes will negate the benefits of even the best grade. I check mine every 8,000 kilometers or so.

[PresleyMarie]

After using 0W40 engine oil, I found it to be quite versatile. The 0W low-temperature rating means it handles cold starts effortlessly, while the 40 high-temperature viscosity protects the engine from overheating during high-speed driving or in hot weather. It's suitable for both gasoline and diesel vehicles, especially older models or those with turbocharged systems. Even in the scorching 40°C summer heat of the south, my car runs smoothly without any oil pressure warnings. Don't just focus on the grade; also consider the API standard and choose reputable brands to avoid counterfeit oils that harm your engine. I change the oil regularly, every six months, to extend engine life.