5w/50的意思

"5w/50" is a type of motor oil viscosity grade, which indicates the oil's weight and thickness. Here's what the numbers mean:

• The "5w" refers to the weight of the oil, which is a measure of its thickness. The "w" stands for "winter," and the number before it (5 in this case) indicates how well the oil will flow in cold temperatures. A lower number means it will flow more easily in cold weather, making it easier to start your engine.

• The "50" refers to the oil's viscosity at high temperatures, specifically 100°C (212°F). This number indicates how well the oil will protect your engine at high temperatures. A higher number means the oil will maintain its thickness and provide better protection at high temperatures.

So, "5w/50" oil is designed to be both thin enough to flow easily in cold weather and thick enough to provide good protection at high temperatures. It's a common choice for vehicles that operate in a wide range of temperatures.