Gasoline smell when starting up car

#1

After turning on car with defroster and fan on and having it warm up for about 15 min. there is always a smell of gasoline inside the car. We cannot seem to detect the cause.

#2

If you want a useful answer, you need to give us some information that is currently a mystery:

Make
Model
Model year
Odometer mileage
Engine size/type
Whether it has been maintained according to the mfr’s maintenance schedule
Typical ambient temperature on the days when the odor has been detected

#3

My guess early 2000’s Subaru.

#4

That is very possible, but we should not have to guess.