U.S. officials are expected to soon announce a temporary waiver of federal rules that require the use of summer-blend gasoline, according to three sources familiar with the matter. The step is intended to help blunt rising fuel costs that have emerged amid disruptions to global supply linked to the Iran conflict.
Under the change, refiners and retail fuel sellers would not be compelled to shift to the more expensive summer blend in many regions. In addition, fuel outlets would be allowed to keep selling gasoline containing 15% ethanol - commonly referred to as E15 - through the summer driving season, a period when tighter rules typically curb its availability across much of the United States.
The United States normally mandates a switch to summer gasoline blends to reduce air pollution during warm months. These blends are formulated for lower volatility - measured by Reid Vapor Pressure - so they evaporate less readily in hot weather and produce fewer emissions that can contribute to smog. Temporarily lifting those restrictions would relax those seasonal requirements.
Energy markets have tightened amid the Iran conflict, with oil and gasoline prices responding sharply. U.S. crude rose above $100 a barrel - the first time since the 2022 Russia-Ukraine shock - and gasoline prices in the United States have climbed to levels not seen since late 2023, reflecting the broader shift in global supply and demand conditions cited by sources.
Key takeaways
- Federal waiver expected to postpone or remove summer-blend obligations, easing cost pressure on refiners and retailers.
- Continued sale of E15 during the summer driving season would be permitted where it is normally limited, keeping a lower-cost ethanol blend available to consumers.
- Move is a response to rising oil and gasoline prices tied to supply disruptions from the Iran conflict, which have pushed U.S. crude above $100 a barrel and gasoline to its highest levels since late 2023.
Risks and uncertainties
- Timing and formal announcement remain uncertain - action is described by sources as expected rather than confirmed.
- Relaxing summer-blend requirements could increase evaporative emissions because those blends are specifically designed to limit fuel vapor in warm weather.
- Fuel price volatility could persist if the Iran conflict continues to disrupt global supply, sustaining pressure on oil and gasoline markets.
The reported policy shift would directly affect refiners and fuel retailers by altering compliance requirements and potentially reducing costs associated with producing and selling summer-grade gasoline. Motorists could see lower pump prices if retailers pass through savings, while broader energy markets remain sensitive to ongoing supply disruptions related to the Iran conflict.