Costco Gas — Westminster, CO

The Costco gas station at 6400 West 92nd Avenue, Westminster, CO 80031 is open Monday–Friday 6 AM–10 PM, Saturday 6 AM–8:30 PM and Sunday 6 AM–7:30 PM. These hours were last checked on August 20, 2026 against the station's Google Maps business listing. Hours can change, so confirm with the station before a long trip.

Yes. On Sundays this station is open 6 AM–7:30 PM, according to the hours on file.

It is at 6400 West 92nd Avenue, Westminster, CO 80031. The listed phone number is +1-303-650-1476.

Yes. A valid Costco membership card (or app) is required to purchase fuel at any Costco gas station, including this one in Westminster.

Costco gas stations accept Visa credit cards, most debit cards with a PIN, and Costco Shop Cards. Cash, checks, Mastercard, and American Express are not accepted.

Yes. All Costco gasoline is TOP TIER™ certified, meaning it contains enhanced detergent additives that meet engine manufacturer specifications to keep your engine clean and running efficiently.

Costco gas stations follow the warehouse holiday schedule. US Costco warehouses close on New Year's Day, Easter Sunday, Memorial Day, Independence Day (July 4), Labor Day, Thanksgiving Day and Christmas Day, according to a news report citing Costco's website; we have not yet confirmed this list on Costco's own site. Other holidays may have shorter hours, so check locally. See the holiday schedule and sources →