Fuel

Jim Rossbach

Director of Technical Services and Quality Systems
CHS - Cenex Fuel and Lubricants


With nearly eight decades in the refined petroleum business and three decades in renewable fuels, CHS has earned its reputation as a safe, dependable supplier of high-quality energy products — those that keep tractors and fleets running smoothly, fuel cars and buses, and warm homes all across the country. CHS ranks as North America’s largest cooperative refiner and a significant wholesaler and reseller of refined fuels. We are a major producer and marketer of lubricants, as well as one of the nation’s largest propane wholesalers. CHS markets energy products primarily under the Cenex® brand through a broad range of working partnerships; we also market under private labels for other businesses. Our network of Cenex® branded convenience stores ranks among the top 20 in the nation. In addition, we offer a variety of petroleum and propane equipment, and we process more than 60 million credit card transactions annually.

Jim Rossbach has 30 years in the lubricants industry including 10 years in Technical Services and in Quality Systems management.

  • Fuel

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    Tank location and storage temperatures impact a fuel's storage life. As diesel fuel is stored, it slowly reacts with oxygen in the air to form gums and varnishes. This reaction over time will form enough sludge to cause equipment filter plugging and unscheduled down time. In addition as temperatures increase, the rate of sludge formation also increases. Other sources of contamination can come from water, dust and microbes, which enter into the storage tank through faulty or improperly designed vent pipes and will cause fuel degradation to accelerate. Generally, fuel can be safely stored for about six months. If long-term storage (over 6 months) is required, the fuel should be treated with both a fuel stabilizer, and a biocide. Treating a diesel fuel with these 2 products will help prevent the buildup of sludge formed from oxidation and microbes (bugs). No fuel storage program can be successful without good housekeeping. Good housekeeping practices are important in preventing the buildup of contaminates, and if done proactively will help ensure an optimum storage environment for fuels and a maximum fuel storage life. In addition it is helpful in preventing oxidation, if the tank has proper ventilation, is underground or inside to reduce temperature extremes. After fuel has been stored for one year or longer, fuel testing is recommended. 

    The stabilizer additives in Cenex Roadmaster XL and Ruby Fieldmaster reduce the formation of gum and varnish deposits and can double the fuel's storage life.

    For further information about fuels, propane and lubricants visit our website at cenex.com.

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