Costco gas stations generally have extended hours compared to the warehouse stores. Most Costco gas stations open early, around 5:30 to 6:00 AM, and close late, typically around 9:00 to 10:00 PM on weekdays. On weekends, the gas stations usually close earlier, around 7:30 to 8:30 PM. For example, a specific Costco gas station in Fullerton, CA, operates from 5:30 AM to 10:00 PM on weekdays, 6:00 AM to 8:30 PM on Saturdays, and 6:00 AM to 7:30 PM on Sundays
. These hours can vary slightly by location, so it is recommended to check the exact hours for your local Costco gas station via the Costco app or the warehouse's location details online
. Costco gas stations are not open 24/7 because they require employees to be on duty for safety, membership verification, and assistance, and Costco prefers not to have staff working overnight shifts
