Janesville, Wisconsin – December 15, 2025 – Rock Energy Systems (RES) today announced the launch of Frigid Fix™, a high-performance diesel additive engineered to keep portable heaters and diesel engines running in extreme cold. The formula prevents fuel gelling below 15 °F, improves cold starts, cleans nozzles and injectors for better combustion, and stabilizes fuel year-round.
There are many diesel additives on the market, but Frigid Fix™ was developed as a special formula to be accepted by fuel-fired portable heaters that run on diesel. As a brand built by Rock Energy Systems, we understand the real-world problems caused by diesel gelling. With more than 50 years of experience designing, building, and supporting heating equipment, we also recognized that there has never been an additive engineered specifically to help portable heaters fire up quickly and run at peak performance in frigid temperatures.
