John Deere is taking biodiesel support up a notch in Midwestern field demonstrations, where farmers are running the company's equipment on 30% biodiesel. This session traces that road to B30 from every angle of the supply chain: engineering and equipment performance, fuel quality and logistics and end results in the field.
The significance extends beyond one demonstration program, marking a desire for higher blends that can perform reliably at scale. We'll look at what B30 adoption could mean for the broader equipment industry, offering a glimpse of what's possible when higher blends become the norm, not the exception
Panelists:
Nate Green
Director, Biofuels
John Deere
Nate Green joined John Deere in 2025 to promote growth in renewable fuels such as ethanol, biodiesel, renewable diesel and SAF via coalition-building, advocacy and strategic investments. Prior to Deere, he spent 13 years at Chevron Renewable Energy Group, North America’s largest biodiesel producer, with roles as Executive Director, Global Sourcing; Director, Business Development; and Senior Counsel.
Green holds a J.D. from the University of Iowa College of Law and an M.A. in political science from Leiden University, where he studied as a Fulbright Fellow. An Iowa native, Green grew up in Fort Dodge, where his family owns a century farm.
Curt Dunafin
Technical Product Manager – Energy
GROWMARK
Curt Dunafin is the Technical Product Manager – Energy at GROWMARK, Inc., specializing in fuel quality, fuel cleanliness and additive technology. With more than 25 years of experience in chemical additives and fuels, Curt focuses on translating fuel chemistry into reliable, real-world equipment performance. His expertise spans biodiesel and renewable diesel applications, additive development and testing, fuel storage best practices, and management of fuel stability, filterability and moisture control. Through his work, Curt helps ensure high-quality fuel and dependable performance from tank to tailpipe.