What type of engine oil does the Citroën C5 use?

[BrynleeFitz]

Citroën C5 uses engine oil with the specification 5W40. Below is a detailed introduction to the types of engine oil specifications: 1. High-temperature type: such as SAE20-SAE50, where the number indicates the viscosity at 100°C, with higher numbers representing higher viscosity. 2. Low-temperature type: such as SAEOW-SAE25W, where 'W' stands for winter use only, and lower numbers indicate lower viscosity and better low-temperature fluidity. 3. All-weather type: such as SAE15W/40, 10W/40, 5W/50, indicating that the viscosity grade at low temperatures meets the requirements of SAE15W, 10W, and 5W respectively, and the viscosity grade at high temperatures meets the requirements of SAE40 and 50, making them suitable for both winter and summer use.