Arizona gas prices
Arizona gas prices tend to run slightly above the national average. The state doesn't have its own refineries, so all fuel gets piped in from PADD 5 refineries in California or shipped from the Gulf Coast. That dependency on outside supply means Arizona prices move with California's market more than you might expect.
Phoenix is the main demand center, and prices there set the tone for the rest of the state. Tucson typically runs a few cents cheaper. The state's gas taxes are moderate, not as high as California or Washington but not as low as the Gulf Coast states. Summer heat doesn't directly affect gas prices much, but the state does require a special fuel blend in the Phoenix metro area during summer months, which can add a few cents.
Price history
Why do Arizona gas prices follow California's?
Arizona imports most of its fuel from California refineries via pipeline. When California has refinery issues or supply disruptions, Arizona feels the impact almost immediately. The two markets are closely linked.
Is gas cheaper in Tucson than Phoenix?
Usually by a few cents. Phoenix has a larger population and requires a special summer fuel blend that costs slightly more to produce. Tucson doesn't have the same blend requirements.
Does Arizona have a special fuel blend requirement?
Yes. The Phoenix metro area requires a reformulated gasoline blend during summer months to reduce smog. This blend costs more to produce and can push Phoenix prices a few cents above the rest of the state.