How Many Years Does It Generally Take for Automotive Fuel Lines to Age?

1 Answers
MargaretDella
07/30/25 12:36am
Fuel delivery lines are generally not prone to damage, and a fuel line can last about three to five years or 120,000 kilometers. The Function of Automotive Fuel Lines: The purpose of the automotive fuel return line is to allow excess fuel to flow back to the fuel tank, reducing fuel consumption. Most modern vehicles are equipped with a fuel return line. When the fuel pump supplies fuel to the engine, it creates a certain pressure. After the normal supply to the fuel injectors, any remaining fuel is sent back to the tank via the return line. Diesel engine fuel supply systems typically have three return lines, though some may only have two, omitting the return line from the fuel filter to the tank. Maintenance Methods for Automotive Fuel Lines: 1. Directly add a fuel system cleaner to the fuel tank—this is the simplest method. A qualified additive can not only reduce fuel consumption but also enhance performance, maintain the engine, and remove carbon deposits. 2. Completely remove the entire fuel line for thorough cleaning. This method is used for vehicles with severely clogged fuel lines but is the most time-consuming and requires the highest technical skill from the technician. 3. Use a no-disassembly cleaning machine. This method involves connecting the engine's fuel supply and return lines to the corresponding lines of a specialized no-disassembly cleaning machine, forming a closed loop with dedicated adapters.
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