Costco Gas Prices in San Diego, CA

San Diego, California has 4 Costco fuel centers serving members in the area. Across San Diego, regular gas averages $5.839 and premium runs about $0.360 higher at $6.199. That's about $0.136 above the California statewide average of $5.703. Within San Diego, Costco Mission Valley posts the lowest regular at $5.799 and Carmel Mountain the highest at $5.899 — a $0.100 spread worth checking before you fuel up. Across San Diego, regular pump prices have climbed about $0.050 over the past month, from $5.789 a month ago. Premium has eased about $0.040 over the same period. None of the San Diego Costco fuel centers currently sell diesel.