May E15 Waiver Expands Ethanol Fuel Amid Global Tensions

From May 1–20 the EPA is allowing a temporary nationwide E15 (15% ethanol) waiver to let more stations sell this blend in a bid to bolster the domestic fuel supply amid geopolitical tensions. E15 is cheaper but has lower energy density, typically shaving about 1.5–2% off fuel economy (more in heavy use), and can damage older engines and small equipment not designed for higher ethanol content. Most 2001+ vehicles can run E15, but carbureted engines and some specialty equipment should avoid it. The policy also aims to simplify fuel markets by lightening “boutique” blends into a single national pool, though smog concerns in summer remain a consideration. Readers should verify fuel choices for their specific vehicle and equipment.