Purpose and Specifications

STP Ultra 5-in-1 Diesel System Cleaner is your go-to fuel additive for keeping diesel engines running smooth and efficient. This 400ml bottle packs advanced synthetic technology that deep cleans the entire fuel system, removes harmful deposits, and fights engine friction for better performance and fuel savings.

Designed specifically for diesel fuel, it treats up to 80 liters per bottle when added to a half-full tank. Use it every 6,000 km or 3 months to maintain peak power and prevent buildup that robs your engine of efficiency. Works reliably in operating temperatures from -20°C to 120°C, ensuring protection in cold starts and hot hauls.

• Deep cleans injectors, valves, and combustion chambers
• Boosts fuel economy by keeping intake system spotless
• Reduces friction to cut wear and extend engine life
• Shelf life of 3 years when stored in a cool, dry place

When to Use / Replace?

Add STP Ultra 5-in-1 every 6,000 km during routine refueling, or sooner if you notice rough idling, power loss, or poor mileage. It's ideal for fleet vehicles, daily drivers, or long hauls where diesel deposits build up fast. Replace the treatment routine every tank or as needed - no over-treatment issues since it's formulated safe for continuous use.

Pro Tip: Pour the full 400ml bottle into your diesel tank before filling up for even mixing and maximum cleaning power.

Frequently Asked Questions

Can I use this in any diesel engine? Yes, it's safe for all diesel vehicles including cars, trucks, and SUVs - just one bottle per treatment.

How soon will I notice results? Many drivers report smoother running and better mileage after just one tank, with full benefits by 3,000 km.

Is it safe for modern diesel particulate filters (DPF)? Absolutely, the formula is designed to clean without harming emissions systems.