D-A Lubricant Company, Inc. has always been about quality. Since the first grease sold in 1919, D-A has offered the best lubricants and the most highly educated sales and technical staff in the field. D-A maintains an ISO 9001-2008 certification. D-A offers a complete line of lubricant products: diesel, gasoline, natural gas and cogeneration engine oils, gear and transmission lubricants, hydraulic fluids, DEF, antifreeze, industrial lubricants, specialty products and used oil analysis. D-A’s knowledgeable Tech Service staff is able to match each piece of equipment to the lubricants and support fluids that will keep it functioning at top proficiency.