Why gas prices vary so much across the US

Gas prices across the US show stark regional variation, with California experiencing nearly $6 per gallon while Oklahoma pays $3.27, reflecting significant state-by-state differences in fuel costs. The disparity stems from multiple factors including state-specific fuel blends and environmental regulations, with California's stricter emissions standards requiring more expensive gasoline formulations than other states. Tax differences also play a role, as states levy varying excise taxes on gasoline that directly affect pump prices. Supply chain logistics and refinery capacity differ by region, meaning some states rely on more costly fuel transportation or have limited local refining capability. These combined factors—regulation, taxation, and infrastructure—explain why drivers in some states pay nearly double what consumers pay elsewhere for the same product.