The car gasoline filter can be cleaned.
Method/Step
1. Remove the gasoline filter element.
2. First, spray the two ends of the filter with carburetor cleaning agent, and black liquid can be seen flowing out.
3. Inject gasoline again and clean all channels and sediment with gasoline. Block both ends and shake vigorously, repeating several times until the poured gasoline is clear. At this point, the interior is already clean.
4. After washing the filter element with gasoline to remove the scale, compressed air should be used to blow off any residual substances.
5. When reassembling, check the condition of the gasket and replace it with a new one if necessary.

It is not recommended to reuse the oil filter after cleaning. This is determined by the particularity, precision and complexity of oil filter:
1. Particularity: oil filter, also known as oil grid. The function is to filter out metal debris, dust, as well as carbon and colloidal deposits that are oxidized at high temperatures during engine operation, ensuring the cleanliness of the lubricating oil and extending its service life. The oil filter shall have the characteristics of strong filtering ability, small flow resistance, long service life, etc. Once these requirements cannot be met, irreversible damage will be caused to the engine;

2. Precision: the requirements for oil filter are:
a. Filter out all particles larger than 30 um
b. Reduce particles that enter the lubrication gap and cause wear (less than 3 um -30 um)
c. The oil flow rate meets the oil demand of the engine
d. The replacement cycle should be at least longer than the lifespan of the oil
e. The filtration accuracy meets the requirements of protecting the engine and reducing wear
f. Large ash capacity, suitable for harsh environments
g. Able to adapt to high oil temperatures and corrosive environments
h. When filtering oil, the lower the pressure difference, the better, to ensure that the oil can pass smoothly;

3. Complexity: The oil filter consists of filter paper, sealing ring and various valves:
a. Filter paper: oil filter has higher requirements for filter paper than air filter, mainly because the temperature of engine oil varies from 0 to 300 degrees. Under severe temperature changes, the concentration of engine oil also changes accordingly, which will affect the filtering flow of engine oil. The filter paper of high-quality oil filter should be able to filter impurities under severe temperature changes while ensuring adequate flow.
b. Rubber sealing ring: The filter sealing ring of high-quality engine oil is made of special rubber, ensuring 100% non oil leakage.
c. Backflow suppression valve: when the engine is stopped, it can prevent the oil filter from drying; When the engine is ignited again, it immediately generates pressure and supplies oil to lubricate the engine.