A self-service gas station is a facility where customers can fill their vehicles with fuel without the assistance of an attendant. At these stations, drivers park their cars next to fuel pumps and use a payment method, such as cash or a credit card, to pay for the gas. This system allows for quicker service and often lower prices compared to full-service stations. Most self-service gas stations offer various types of fuel, including regular unleaded, premium unleaded, and diesel. Many also provide additional services, such as car washes and convenience stores, where customers can purchase snacks, drinks, and other items while they refuel.