How to refuel when driving in the US ?

Fuel Summary: U.S. oil prices are in line with international oil prices, with gasoline costing about $3.52 to $4.07 per gallon and diesel being slightly cheaper. Most gas stations are self-service and accept cash and credit card payments. Local fuel terms: Gas station: Gas station Diesel: Diesel Gasoline: Petrol / Gas 87 octane gasoline: Regular / Unleaded 89 octane gasoline: Plus 91 octane gasoline: Supreme / Premium 93 octane gasoline: V-Power / Ultra How to distinguish between diesel and gasoline: Diesel fuel nozzles in the U.S. are usually green, while gasoline nozzles are usually black. Gasoline is divided into 87 (Regular), 89 (Plus), and 91 (Supreme). Most vehicles choose 87 octane gasoline, which corresponds to 97 octane gasoline domestically. Instructions for using the fuel pump: In the U.S., it is generally pay first, then pump, usually in two ways: 1. Self-service card swiping for fueling: Insert the nozzle into the car's gas tank -> Swipe the credit card -> Select the type of fuel -> Enter the amount of fuel or money -> Squeeze the nozzle switch to refuel -> Return the nozzle after refueling -> Automatic deduction and receipt retrieval. Some fuel pumps require entering a zip code after swiping a credit card: Some mainland credit cards can use 00000 for this, but if not supported, you can only pay inside the store or with cash. 2. Prepaying with an attendant and then self-service refueling: After parking, go to the store to pay the gas station attendant, usually with cash or credit card. For example, if you want to use pump 5 to add $20 of gasoline, you can tell the attendant, "Pump 5, 20 dollars." The pump will automatically stop when the corresponding amount is reached. If the prepaid amount is more than the actual refueling amount, don't forget to go back for change. Fueling precautions: Fuel prices vary greatly in different regions. Generally, fuel is most expensive in tourist areas, especially in remote mountainous areas, and cheaper in small and medium-sized towns, and more expensive in large cities. Recommended local gas stations: Recommended major brands: SHELL, TOTAL, MOBIL, Chevron, etc.