Diesel purification: Diesel contains various minerals and impurities, and if these are not removed through sedimentation and filtration, they can affect the operation of the pistons and fuel injectors. This leads to uneven fuel supply and poor fuel atomization, resulting in reduced engine power and increased fuel consumption. Therefore, it is recommended to let the diesel stand for a while so that impurities can settle, and to use a funnel with a filter when filling it. Furthermore, the filter should be cleaned or replaced regularly to achieve purification. Removing carbon deposits: During operation of diesel engines, polymers accumulate on the valves, valve seats, fuel injectors, and the top of the pistons. These carbon deposits increase fuel consumption and should be removed promptly. Avoid overloading. Machinery produces black smoke when operated under overload, which is the result of unburned fuel being emitted. As long as the machine keeps emitting black smoke, it will increase fuel consumption and also shorten the lifespan of its components. Maintain water temperature: If the cooling water temperature of a diesel engine is too low, the diesel fuel will not burn completely, which affects performance and also results in fuel waste. Therefore, insulation curtains should be used appropriately, and care should be taken to use soft water free of minerals for cooling water, such as flowing river water. Regular inspection and maintenance are essential; one must be vigilant and proactive, checking the machinery regularly or occasionally, taking good care of it and maintaining it frequently. It is important to uphold the principle that prevention is better than repair, and to ensure that the machinery does not operate while faulty.