Dynamic Fuels, LLC and Mansfield Oil Company have signed an agreement to supply renewable diesel to Norfolk Southern Corporation.

Norfolk Southern has primarily been using a 100% pure Dynamic Fuels renewable diesel at its Meridian, Mississippi rail yard since early January.

Dynamic Fuels, a 50/50 venture owned by Tyson Foods, Inc. and Syntroleum Corporation, recently signed commercial off-take and strategic alliance agreements with Mansfield to market renewable diesel to fleet customers.

Dynamic Fuels, operator of the first commercial advanced biofuels plant in the United States, produces next-generation renewable and synthetic fuels from animal fats and greases.

The company’s Geismar, La., plant produces renewable diesel as “drop in” fuel that can replace 100% of petroleum diesel in a diesel engine without engine modification.

“Norfolk Southern is pleased to be the first fleet user of renewable diesel in the United States,” said Gerhard Thelen, Norfolk Southern vice president operations planning and support.