What are the Three Filters in Engine Oil?

[IsabelMarie]

The three filters in engine oil refer to the air filter, oil filter, and fuel filter, which are used to remove impurities and maintain cleanliness. Timely cleaning will help improve the working environment inside the vehicle's engine. Air Filter: Ensures the air entering the engine is clean. The air contains suspended dust, primarily composed of silicon dioxide, a substance harder than metal. Installing an air filter can reduce wear on components such as cylinders, pistons, and piston rings. Fuel Filter: Ensures clean fuel and prevents vapor lock. During fuel storage, transportation, and refueling, impurities and moisture inevitably mix into the fuel. These impurities, when carried into the fuel supply system and engine cylinders, accelerate cylinder wear. Oil Filter: Filters engine oil to ensure normal engine operation. Among the three filters, it is the most important for internal combustion engines. During operation, mechanical impurities such as dust, metal shavings, and carbon deposits continuously mix into the oil. Additionally, oxidation caused by air and combustion exhaust gases gradually forms sludge when combined with mechanical impurities. This not only accelerates wear on moving parts but also easily clogs oil passages.