Answer: Lubricating oil has a decisive influence on the performance of oil-injected screw air compressors. If it is used improperly or replaced in time, it will cause serious damage to the air compressor body. Lubricating oil must be replaced in time, otherwise the quality of the oil will decline, the lubricating performance will decline, and it is easy to cause high-temperature tripping. At the same time, the tendency of lubricating oil to deposit carbon increases under high temperature conditions. If the ignition point of the oil drops, it is also easy to cause the oil to spontaneously ignite and cause the air compressor to burn out.