The U.S. Navy reports it is seeking at least 37 million gallons of drop-in bio-fuels for delivery from April of next year.

The biofuels can be blended in a range of 10 to 50 percent with conventional petroleum products and must meet all military fuel specification properties, which make handling requirements and performance indiscernible to the end user.

The fuels are being sought as part of the Navy's F-76 marine diesel and JP-5 shipboard jet fuel supply.

Details of the need are in the Inland/East/Gulf Coast bulk fuels solicitation released June 9 by the U.S. Defense Logistics Agency.

"Expanding military energy sources improves the reliability of our overall fuel supply, adds resilience against supply disruptions, and gives the military more fuel options to maintain its readiness and defend the national security interests of the United States," the Navy said.

Bids are due by July 9. Details can be obtained at www.fbo.gov., solicitation number SP060014R0061.