Costco South Carolina Gas Prices

Costco operates 7 fuel centers in South Carolina, spread across 7 cities. Across the state, regular gas averages $3.478 and premium runs about $0.791 higher at $4.269. The lowest-priced regular pump is at Costco Spartanburg in Spartanburg at $3.329, while Mt Pleasant in Mount Pleasant sits about $0.270 higher. Across the state, regular pump prices have eased about $0.033 over the past month, from $3.510 a month ago. Premium has eased about $0.033 over the same period.

If your vehicle takes premium, the lowest in South Carolina is Costco Spartanburg in Spartanburg at $3.879. Pump prices shift from one warehouse to the next with local taxes, fuel-blend rules, and transport costs, but Costco fuel is members-only and usually runs below nearby branded stations — which is what keeps these pumps busy.