How to Choose the Right Engine Oil Viscosity Grade?
2 Answers
Choosing the right engine oil viscosity grade: Temperature and operating conditions are two key criteria for selecting engine oil. In regions with low winter temperatures, opt for a grade with a smaller number before the "W." For those who enjoy driving fast or have older vehicles, choose a grade with a higher viscosity coefficient after the "W," preferably from higher-end brands. When selecting engine oil, focus on two main aspects: the oil's performance level and its viscosity. Additional Information: 1. The performance level of engine oil can be found on the outer packaging of the oil container, with different levels suited for different engines. Generally, engines with higher RPMs or vehicles with higher cylinder pressures require higher-quality oil. Refer to the vehicle's manual; if the same performance level is unavailable, choose one grade higher than recommended, never lower. 2. For viscosity selection, consider the vehicle's usage and engine condition. In cold northern winters, choose oil with strong low-temperature fluidity. For older engines with poor cylinder wall sealing, thicker oil is recommended, as overly thin oil may lead to oil consumption issues. In southern regions with stable temperatures, 10W-20 oil is sufficient, and there's no need to opt for expensive options.
As a daily commuter, I pay close attention to the manual and actual needs when selecting engine oil models. First, I check the owner's manual, which clearly specifies the recommended viscosity grade, such as 5W-30 or 10W-40. The 'W' stands for winter low-temperature fluidity, and a smaller number ensures smoother starts in cold weather. Then, I consider my driving environment: in the hot southern summers, I use slightly thicker oil to prevent overheating, while in the freezing northern winters, I opt for thinner oil to avoid sluggishness. Driving habits also matter—for frequent city traffic jams, synthetic oil offers better durability and fuel efficiency, whereas high-speed long-distance driving demands enhanced cooling protection. Don’t overlook the API specification; labels like SP or SN on the bottle indicate quality grades, ensuring compatibility with my car brand. Finally, I adhere to oil change intervals of 5,000 to 8,000 kilometers, regularly checking oil levels and cleanliness to avoid counterfeit products. Choosing the right oil keeps the car running quietly and economically while significantly extending engine life.
