What Causes the Smell of Burning Oil Inside the Car?

[VonEva]

The reasons for the smell of burning oil inside the car include aging of the charcoal canister rubber hose and overfilling of gasoline. Aging of the charcoal canister rubber hose: This rubber hose, which connects the charcoal canister to the throttle body, gradually ages with increased mileage. Aging can cause gasoline vapor leaks, resulting in a persistent gasoline smell inside the car. Overfilling of gasoline: Gasoline may flow into the charcoal canister through the fuel line. The charcoal canister is designed to absorb gasoline vapors, but when soaked with gasoline, it may excessively release gasoline vapors through the vent, especially when the air conditioning is in external circulation mode, making the gasoline smell particularly strong.