Replacing the diesel filter element does not require changing the settling cup and can drain water. Generally, replacing the diesel filter element every 10000 kilometers.
The main function of the settling cup is to filter out impurities in gasoline. If the gasoline filter is too dirty or blocked, the main manifestation is: when the fuel door is filled, the power starts slowly or cannot start, and the car is difficult to start. Sometimes, it takes 2-5 times to start.
Most engines are equipped with disposable, non removable, paper filter gasoline filters, with a replacement cycle of 10000 kilometers. If you add less diesel impurities, replacing one filter every 15000 to 20000 kilometers is not a problem. The settling cup has arrow markings on the inlet and outlet of the oil, so do not install it upside down during replacement.

The function of diesel filter element:
The sulfur content in domestic diesel is very high. If there is a problem with the diesel filter of a car, the sulfur element will directly react with water to generate sulfuric acid, which will corrode the internal parts of the engine. Therefore, it is very necessary to regularly replace the diesel filter element.
The function of a gasoline filter is to filter out moisture and impurities from gasoline. When the engine is working, the fuel passes through the intake pipe and enters the settling cup of the filter under the action of the gasoline pump. Due to the increase in volume and decrease in flow rate at this time, water and impurities heavier than oil settle at the bottom of the cup. Light impurities flow with the fuel to the filter element, while clean fuel seeps into the interior of the filter element through the micropores of the filter element and then flows out through the oil pipe.