Purpose and Specifications

STP Diesel Stop Smoke is a powerful 200ml fuel additive designed to quickly cut black smoke from your diesel engine's exhaust, often within 1 hour of use. It cleans the fuel system and injectors, reducing noxious emissions while boosting fuel efficiency and restoring lost power.

• Treats up to 60 liters of diesel fuel per bottle for everyday driving.
• Compatible with all diesel engines, including direct injection (DI), indirect injection (IDI), and common rail systems.
• Safe for catalytic converters and works well with other STP additives.
• Recommended every 2,000 km (1,250 miles) to keep your engine running clean and smooth.

This mid-range STP product weighs just 0.216 kg, making it easy to store and carry for regular maintenance.

When to Use / Replace?

Use STP Diesel Stop Smoke whenever you notice excessive black smoke, rough idling, or poor fuel economy in your diesel vehicle. It's perfect for cold starts in temps as low as 0°C, helping prevent injector buildup that causes smoke and power loss. Add a fresh bottle every 2,000 km or monthly for heavy use to maintain peak performance. Shelf life is typically 3-5 years when stored in a cool, dry place away from direct sunlight.

Frequently Asked Questions

Q: How soon does it reduce smoke?
A: You'll see less black smoke and emissions within 1 hour after adding it to a full tank.

Q: Is it safe for my modern diesel engine?
A: Yes, it's formulated for all types, including common rail systems, and won't harm catalytic converters.

Q: How often should I use it?
A: Pour the entire 200ml bottle into 50-60L of fuel every 2,000 km for best results and ongoing cleanliness.