Question
What does the "W" in viscosity grade (e.g. 5W-30) stand for?
Winter
Weight
Water
Width
Winter
Weight
Water
Width
Answers
GPT-4o mini
The "W" in viscosity grades like 5W-30 stands for "Winter." It indicates the oil's viscosity characteristics in cold temperatures. The number before the "W" represents the oil's flow properties at low temperatures, while the number after the "W" represents its viscosity at higher temperatures.