for the past 2 weeks when i put gas in my car it will hit the full marker but then like 10 mins later with no driving or like 1/4 mile trip back to the house the meter will go down to its actual level go back to put gas in it like 2 more gallons then meter will take like 15 mines before going back up to the full mark??? its drivin me crazy

 

take it to the dealership