With the cost under fifteen dollars at most auto-stores, I consider this to be a good investment if you lose your old cap. The reason I originally looked into this cap was because the OEM hanger, which the original cap hangs from during refueling broke off. While this cap is useful, I would not consider it a time saver. It falls more into the category of convenience, or peace of mind knowing you will never drive off with your cap on top of your car, or set off a check engine light from not tightening the cap properly.