Can You Change the Oil Filter Without Changing the Oil?

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It is not advisable to change only the oil without replacing the oil filter in a car. Here are specific details about 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, supplying clean oil to moving parts like the crankshaft, connecting rod, camshaft, turbocharger, and piston rings. It plays a role in lubrication, cooling, and cleaning, thereby extending the lifespan of these components. 2. Efficiency: After being used for a period, the filter element accumulates sludge and metal debris, reducing its filtering efficiency and significantly decreasing the oil pressure passing through the filter. 3. Working Principle: When the oil pressure drops to a certain level, the oil filter bypass valve 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 clog the oil passages, leading to mechanical failures.