U.S. drivers are seeing fuel costs climb again as the conflict involving Iran adds new strain to oil markets. The latest jump has pushed crude above $100 a barrel and lifted the national average gasoline price past $4 a gallon, bringing another round of pain at the pump.

Analysts say the recent increase may not be a short-lived spike. After months of war, energy traders are increasingly factoring in the possibility that global oil and fuel flows could face a more lasting period of disruption.

That matters beyond daily gas prices. When oil markets start pricing in long-term risk, the effects can spread through transportation, shipping and household expenses, keeping pressure on consumers even if the immediate shock eases.

The central concern is that the latest rise in gasoline may be the beginning of a broader reset rather than a brief surge. If the conflict continues to unsettle energy supplies, motorists and businesses could face elevated fuel costs for longer than many had expected.