Purpose and Specifications

The Kleen-Flo 991 Diesel Fuel Conditioner is a 150 ml budget-class additive designed for diesel engines. It eliminates varnish and sludge buildup to keep your engine clean, reduces corrosion on vital parts, and prevents stalling or frozen fuel lines in cold weather down to -20°C or lower. This formula retards wax formation for smooth fuel flow, restores lubrication lost in low-sulphur diesel, and includes anti-gel properties without methyl hydrate.

When to Use / Replace?

Add one 150 ml bottle to a full tank every 5,000 km or every 3 months during winter driving to maintain protection against gelling and corrosion. Use year-round for heavy-duty trucks or non-road equipment to prevent deposits and extend engine life up to 20% longer. Shelf life is 3 years when stored in a cool, dry place.

• Protects fuel system in temps as low as -20°C
• Treats up to 300 liters of diesel per bottle
• Ideal for cars, trucks, and farm equipment

FAQ

Is Kleen-Flo 991 safe for all diesel engines? Yes, it's compliant with low-sulphur diesel standards and safe for motor vehicles, trucks, and non-road engines like generators.

How much does one bottle treat? One 150 ml bottle conditions up to 300 liters of diesel fuel, perfect for a standard truck tank.

Can I use it in summer? Absolutely, it cleans deposits and boosts lubrication year-round, not just for winter anti-gel protection.