What Causes the Smell of Engine Oil Inside the Car?

[MilaDella]

Here are the specific reasons for the smell of engine oil inside the car: Overfilled Gasoline: Gasoline may flow into the carbon canister through the pipelines. The carbon canister, originally designed to collect gasoline vapors, will release excess gasoline vapors through the ventilation holes when invaded by liquid gasoline. When the air conditioning is in the external circulation mode, the smell of gasoline can enter the car. Gasoline Pipe Leakage: The smell of gasoline may enter the car through the air conditioning system. Leakage usually occurs at the connections between pipes. If there is leakage at the connection points, dust will accumulate on the surface, forming oil sludge, which can be observed when opening the engine compartment. Replacement or Disassembly of the Gasoline Pump: The smell of gasoline inside the car may be caused by residual substances not being cleaned thoroughly after disassembly or replacement. It is necessary to visit a repair shop to check if the gasoline pump is installed correctly.