驗證網址www.funtrivia.com安全性

When you speak of 10w motor oil, what does the w stand for?

In 10W/40 motor oil, the W stands for weight, right? Wrong. It stands for Winter. A vehicle's oil has to be thick, but not too thick. It is important that in the winter, the oil be thin enough to allow for the engine to start. But when the engine is warm,...

網址安全性掃描由 google 提供