Can You Change Only the Oil Filter Without Changing the Oil?

[DeKevin]

It is not advisable to change only the oil filter without changing the oil in a car. Below is a detailed introduction to the oil filter: 1. Introduction: The oil filter, short for oil cleaner, removes impurities such as dust, metal particles, carbon deposits, and soot particles from the oil. It supplies clean oil to moving parts like the crankshaft, connecting rod, camshaft, turbocharger, and piston rings, providing lubrication, cooling, and cleaning functions, thereby extending the lifespan of these components. 2. Efficiency: After being used for a period, the oil filter accumulates a lot of sludge and metal debris on its filter element, which reduces its filtering efficiency. The oil pressure passing through the filter also decreases significantly. 3. Working Principle: When the oil pressure drops to a certain level, the bypass valve of the oil filter opens, allowing unfiltered oil to enter the oil circuit through the bypass. The impurities carried can increase wear on mechanical parts and, in severe cases, may block the oil passages, leading to mechanical failures.