National gas prices hit a four-year high on May 1, 2026, reaching an average of $4.39 per gallon. This spike, which represents a nearly $1.50 increase since late February, is driven by significant oil supply disruptions in the Strait of Hormuz that have destabilized the energy market.
Supply Disruptions in the Strait of Hormuz
The primary driver of this price surge is the disruption of oil supplies moving through the Strait of Hormuz. According to AAA, the national average price of a gallon of gas reached $4.39 on May 1, 2026, marking an increase of nearly $0.40 in a single month. This escalation follows a period of relative stability in early 2026, but the geopolitical instability in the Middle East has rapidly altered the supply-demand balance. The resulting price climb is not limited to regular unleaded; diesel prices have seen an even more aggressive uptick. Nationwide, the average cost of a gallon of diesel increased over 50% since last year, climbing from $3.62 to $5.43. In certain regions, the impact on diesel is even more acute, with prices rising by as much as 60% to 68%.National Fuel Price Breakdown
| Fuel Type | Current Avg. | 1-Month Change |
|---|---|---|
| Regular (87) | $4.39 | +$0.33 |
| Mid-Grade (89) | $4.82 | +$0.37 |
| Premium (93) | $5.14 | +$0.37 |
| Diesel | $5.43 | +$0.33 |
| E85 Flex Fuel | $2.48 | -$0.01 |
Regional Price Extremes and State Averages
The surge is not felt uniformly across the country. West Coast states continue to lead the nation in fuel costs, often maintaining much higher premiums than the national average.| State | Avg. Regular Price | Year-Over-Year Change |
|---|---|---|
| California | $5.89 | +21.4% |
| Washington | $5.31 | +18.2% |
| Oregon | $5.18 | +17.9% |
| Nevada | $4.97 | +19.1% |
| Indiana | $4.88 | +27.3% |
| Ohio | $4.85 | +25.1% |
| Michigan | $4.82 | +22.6% |
