Purpose and Specifications

STP Diesel Treatment is a fuel system cleaner designed to keep your diesel engine running smoothly and efficiently. This 200ml bottle contains a concentrated formula that removes varnish, carbon deposits, and water from your fuel system—problems that build up over time and reduce engine performance.

What it does:

• Removes carbon and varnish deposits from fuel injectors and combustion chambers
• Cleans the entire fuel system to restore lost power and performance
• Improves cold start performance with a cetane improver
• Prevents corrosion and rust inside your fuel tank and fuel lines
• Reduces engine smoke and noise
• Improves fuel lubricity (how well fuel protects fuel pump and injectors)
• Helps prevent fuel line freezing in winter conditions

Key Specifications:

• Volume: 200ml (0.2 liters)
• Weight: 216g
• Manufacturer: STP
• Part Number: STP54200
• Safe for catalytic converters and will not void your vehicle warranty

When to Use / Replace?

Use STP Diesel Treatment regularly to maintain peak engine performance. Add one bottle to your fuel tank every 2,000 kilometers (1,250 miles) or with each fill-up for best results. Regular use prevents deposit buildup before it causes problems, keeping your injectors clean and your engine running at full power.

One 200ml bottle treats a standard fuel tank. For consistent protection, use it as part of your regular maintenance routine rather than waiting for performance problems to appear.

Frequently Asked Questions

Q: Will this additive damage my engine or void my warranty?
A: No. STP Diesel Treatment is safe for all diesel engines, compatible with catalytic converters, and will not void your vehicle warranty.

Q: Can this help with winter driving?
A: Yes. The formula includes anti-gel properties that help prevent fuel line freezing and improve cold start performance in winter conditions, allowing your engine to start more easily in cold weather.

Q: How much fuel economy improvement can I expect?
A: By removing deposits and improving fuel system efficiency, regular use helps restore lost power and can improve fuel economy. Results depend on how much deposit buildup existed before treatment began.