What is the reason for a noticeable gasoline smell when the car is warming up?

[Grover]

The reason for a noticeable gasoline smell when the car is warming up is that during a cold start, the ECU appropriately increases the fuel injection volume based on the intake air temperature and water temperature signals. At this time, the engine has not yet reached its normal operating temperature, and the air-fuel mixture cannot fully combust. A very small portion of the unburned air-fuel mixture is expelled, resulting in the noticeable gasoline smell. The correct method for warming up the car is to start driving 10 to 15 seconds after ignition, but avoid driving at high RPMs during this time. Maintain a low speed, keeping the engine RPM below 3000 to 3500, preferably around 2000 RPM. Otherwise, the intense wear and tear on the engine and transmission caused by high RPMs may be irreversible. Once the engine temperature rises to the normal operating temperature, you can resume your usual driving habits.