Since the 1920s, the Conserv FS has been providing fuels to farmers across Northern Illinois and Southern Wisconsin. Today, the coopertive is a leading supplier of refined and renewable fuels to a wide range of accounts including farmers, truckers, construction companies, municipalities and more. Sales of Dieselex® Gold, the premium diesel fuel with origins back to 1952, are growing rapidly as users experience the benefits of using the latest in fuel-additive chemistry. In fact, it was one of the first fuels to be recognized in the Top Tier Diesel Fuel program.