What is Mobil 10w40 engine oil?
1 Answers
Engine oil 10w40 refers to the viscosity grade of the oil being 10w40. Below are the relevant details: 1. Specifics: The number before 'w' represents cold-start performance. The smaller the number, the easier it is to start the engine in cold weather. Common grades include 0W, 5w, 10w, and 15w. The number 40 indicates the oil's viscosity characteristics at high temperatures. Higher viscosity oils (with higher numbers) may be more suitable for high-speed driving or heavily loaded vehicles. 2. Oil usage: Compared to 10w30, 10w40 has higher viscosity and better sealing properties, which can lead to increased fuel consumption in the engine. At idle, higher viscosity oils produce lower noise levels, while during driving, higher viscosity oils tend to generate more noise. Conversely, lower viscosity oils are characterized by better fuel efficiency.