When you buy a Luyu Heavy Industry wheel loader, you will first consider the engine of the loader, because the engine is the core part of a loader, but the role of the oil can not be underestimated, the oil can form a lubricating film inside the engine to reduce the wear and friction between the various moving parts. To maintain a good friction fit between components, reduce energy loss, improve engine life and performance. Not only that, the oil also helps cool the engine by absorbing and dispersing heat. This helps maintain the normal operating temperature range of the engine, preventing overheating and reducing the risk of engine damage. So the role of oil can not be ignored, then in the daily work, how should we check and maintain the oil?