Costco Gas in Fullerton, CA
1 station in Fullerton, California
Costco Gas Hours in Fullerton
Fullerton has 1 Costco gas station. Weekday hours are typically 5:30 AM to 10 PM. Saturday hours are 6 AM–8:30 PM. Sunday hours are 6 AM–7:30 PM. Membership is required at the pump. Costco gas is TOP TIER™ certified, meeting enhanced detergent standards recommended by most major automakers.
Hours last checked August 20, 2026. How we check
Costco gas in Fullerton: FAQ
How many Costco gas stations are in Fullerton, CA?
Fullerton has 1 Costco gas station: 900 South Harbor Boulevard.
What time does Costco gas open in Fullerton?
On weekdays, Costco gas in Fullerton opens at 5:30 AM and closes at 10 PM. Hours last checked August 20, 2026.
What are Costco gas hours on Sunday in Fullerton?
On Sundays, Costco gas in Fullerton is open 6 AM–7:30 PM.
Do I need a membership to buy Costco gas in Fullerton?
Yes. An active Costco membership is required at the pump.