Paul Machiele

Paul Machiele

Senior Associate

Paul is an independent consultant providing strategic and technical policy advice on fuel policies and transportation emissions for world, federal, state, and local leaders.  After 39 years, he recently retired from EPA’s Office of Transportation and Air Quality where he directed and executed technically, legally, and politically complex projects of national impact, including over 20 Federal regulations for nearly all mobile sources including vehicles, engines, equipment, gasoline and diesel fuel quality, and most recently renewable fuelsHe is a trusted engineer and policy maker having worked with people across EPA, other agencies, industry, environmental and consumer organizations, states and other governments.  He has been a frequent advisor to political appointees on fuel policies impacting the environment and the economy. 

Contributions

Policy

EPA’s summer fuel waiver goes further than it looks, but does it mean an E15 boom?

March 31, 2026

On March 25, 2026, EPA issued a nationwide emergency fuel waiver that goes meaningfully further than the routine annual E15 RVP waivers of recent summers. Rather than simply allowing E15 to be sold alongside E10 during the summer volatility control period, this action effectively eliminates the country’s patchwork of boutique summer fuel formulations, creating a single national gasoline pool at...

Policy

The Long and Winding Road to E15: Is It Finally Nearing Its Breakthrough?

March 19, 2026

For nearly half a century, ethanol has been woven into the fabric of the U.S. gasoline supply. The story began in the 1970s with the introduction of E10 – gasoline blended with 10 percent ethanol – after a Clean Air Act (CAA) 211(f) waiver[1] took effect. By the early 2000s, refiners had embraced E10 wholeheartedly,...