Costco Gas Prices in San Diego, CA
The Morena Blvd Costco (4605 Morena Blvd, near Mission Bay) is at $5.29/gal for Regular as of Aug 6, 2026. California has the most expensive gas in the lower 48 — state taxes and the special CARB fuel blend add roughly a dollar over the national average — which makes Costco's member pricing matter more in San Diego than almost anywhere else.
Today's Costco Member Gas Prices
Costco Gas Station, 4605 Morena Blvd, San Diego, CA. Prices are for Costco members and are updated when station prices change.
About this station
Morena Blvd is one of several Costco gas stations in San Diego County (others include Mission Valley on Fenton Pkwy and Carmel Mountain Rd). This central location near I-5 and Mission Bay tends to be busy on weekends; weekday mornings move fastest.
Membership and payment
Scan your Costco membership card at the pump. Visa credit cards, most debit cards and Costco Shop Cards are accepted; Mastercard, Amex and cash are not.
Why track the price?
California prices swing harder than the national average — refinery maintenance or a blend switchover can move pumps 20-30 cents in a week. The chart above records every change at this station, so you can see whether today is a good day to fill up.