How To Distinguish The Oil Inlet Pipe From The Oil Return Pipe

The oil inlet pipe and the oil return pipe can be distinguished by their different positions, sizes and functions.

Different positions: Usually, the oil inlet pipe is located above the fuel injector, while the oil return pipe is located below, and the oil return pipe branches out from the inside.

Different sizes: Generally, the oil inlet pipe is larger than the oil return pipe, and the oil inlet pipe is the one connected to the fuel filter.

Different functions: The function of the oil inlet pipe is to temporarily store the fuel from the fuel tank after filtering through the gasoline filter into the fuel distribution pipe on the engine. When the injector is powered on, the fuel is sprayed out from the injector and mixed with air. The function of the car's oil return pipe is to return excess oil to the fuel tank to reduce oil consumption.

These differences help to accurately distinguish the oil inlet pipe and the oil return pipe to ensure the normal operation of the car's fuel system.