What Vehicles Are Suitable for 15W-40 Engine Oil?

[OJason]

15W-40 engine oil is suitable for European cars and is recommended for use in southern regions. This is because European car engines typically operate at higher speeds and tend to use higher viscosity oil. Always refer to the vehicle's owner's manual for specific recommendations. Below is a detailed introduction to engine oil: Meaning of Viscosity Grades: Taking 15W-40 oil as an example, the number 50 represents low-temperature fluidity—the smaller the number, the better the oil's low-temperature fluidity. The number 40 represents high-temperature viscosity—the larger the number, the better the oil's high-temperature viscosity. How to Choose the Right Engine Oil Type: First, consult the owner's manual, which specifies the recommended initial oil type for the vehicle. As the vehicle ages, the oil type may need to be adjusted accordingly. At this point, you can adjust the oil viscosity based on the color and thickness of the drained old oil.