California Costco Gas Prices

Costco operates 121 fuel centers in California across 108 cities, with the largest cluster in San Diego (4 stations). Across the state, regular gas averages $5.684, premium runs about $0.41 higher at $6.097, and diesel sits at $6.916. The lowest-priced regular pump is at Costco Clovis in Clovis at $5.359, while Eureka in Eureka sits about $0.94 higher. Across the state, regular pump prices have climbed about $0.15 over the past two weeks, from $5.537 two weeks ago. Premium has climbed about $0.16 and diesel has climbed about $0.04 over the same period. Diesel is sold at 16 of the 121 California locations.