This statement is not entirely accurate. Typically, adopting this approach is primarily aimed at addressing the issue of 'oil consumption' in the engine.

Some customers who used relatively cheap engine oil before may complain that after switching to high-quality engine oil, their oil consumption has increased compared to the past.

Strengthen the monitoring of water content in oil. For hydraulic equipment used outdoors, it is best to use weatherproof tents and strengthen system sealing measures to prevent water from entering. A dryer is installed in the breathing hole of the fuel tank, and a "super adsorption type" drying filter can be installed on the system if conditions permit.

Rust preventive oil is composed of base oil and rust inhibitors. This type of oil focuses on rust prevention and can be customized for different rust protection periods depending on the specific surface requirements of the workpiece. For instance, if the workpiece has residual moisture, as is the case after emulsification processing, dehydrating rust preventive oil can be used, such as OFILL's F209 displacement rust preventive oil, which offers excellent dehydrating and rust protection properties.

The viscosity of engine oil is determined by measurements at a specified temperature (e.g., 100°C). For example, a 15W-40 engine oil with a kinematic viscosity of 14.2 mm²/s at 100°C. High-end engine oils may feel thinner at room temperature, while lower-grade oils may seem thicker. This is because high-end engine oils use highly refined base oils with a high viscosity index, which means they have good viscosity-temperature characteristics.