(NAFB.com) – Corn growers and ethanol producers renewed calls this week for nationwide, year-round access to E15 gasoline, saying regulatory delays continue to hurt farm income. The Renewable Fuels Association said higher ethanol blends could boost corn demand and reduce fuel costs for consumers. Iowa Corn Growers Association officials cited USDA data showing large corn carryouts that continue to pressure prices. Oil industry groups remain divided, arguing that infrastructure and regulatory concerns must be addressed before broader adoption. Meanwhile, several Midwest governors are urging federal agencies to grant permanent waivers ahead of the summer driving season. Ethanol supporters say expanded E15 sales could provide immediate economic relief for rural communities while supporting lower-carbon fuel goals. Without action, farm groups warn that declining margins and limited market access will continue to strain corn-dependent regions.