Diesel-Pep is a conditioner and anti-gel that combats the tendency of ultra-low sulfur diesel (USLD) fuel to gel up faster than regular diesel. Diesel-Pep improves lubricity, cleans injectors, increases cetane, and helps reduce smoke and odors Can be used to treat fuel for any diesel engine, including cars, trucks, tractors, boats, oil furnaces, heaters, and heavy equipment