gascap
- It's screwed off before filling up
- It's replaced after a fill-up
- It's removed to pump fuel
- It's removed at the pump
- It's opened for a fill-up
- It's opened at the pump
- It should be tightened until it clicks
- It gets screwed at the pump
- Energy saver and security device
- Cover removed when refueling the car: 2 wds
- Car's tank cover
- A loose one may activate the "Check engine" light