The Rislone® Hy-per Diesel™ Complete Fuel System Treatment improves the quality of diesel fuel by increasing its cleaning ability, adding lubrication, removing contaminants, combating corrosion, and helping to prevent gelling and fuel breakdown. This dual-chamber bottle contains the same amount of additives as a standard nozzle bottle plus a full fuel system cleaner, cold flow improver against gelling, stabilizer and fuel conditioner, cetane booster and diesel treatment, ULSD sulfur substitute, and UCL pump & nozzle lubricant.

• Cleans injectors, valves, and combustion chambers.
• Enhances cetane, power, performance, and miles per gallon.
• Stabilizes fuel, lubricates, and protects.
• Durable for heavy-duty diesel engines, yet designed for easy installation without leaks in light/medium-duty diesel vehicles.
• Increases power, efficiency, miles per gallon, and saves fuel by lubricating the entire fuel system. Safe to use in vehicles with converters, DPF filters, or DEF systems.
• Helps eliminate black smoke, fuel gelling, clogged injectors, rough idle, and hard starts. Works equally well in trucks, SUVs, and passenger diesel vehicles.

Engine cleaning and protection since 1921.