Purpose and Specifications

LIQUI MOLY Pro-Line Diesel Filter Additive 500ml is a premium diesel fuel system cleaner designed for easy use during filter changes. Pour it directly into the new diesel filter housing to fill it completely, preventing air bubbles and allowing immediate engine start. Add the rest to your fuel tank for full protection. This powerful formula cleans injectors and the entire fuel system, improves fuel spray for better combustion, saves fuel, and quiets engine noise while making starts easier.

• Cleans fuel system and injectors during routine filter replacement every 20,000-40,000 km or 12-24 months
• Protects against corrosion across the whole fuel system for long-term reliability
• Boosts fuel lubrication, reducing wear in all diesel engines including those with DPF
• 500ml bottle treats up to 70 liters of diesel fuel
• Shelf life: 4 years when stored cool and dry (under 25°C)

When to Use / Replace?

Use this additive every time you replace your diesel fuel filter, typically every 20,000-40,000 km or 12-24 months depending on driving conditions. It's ideal for preventive maintenance to avoid injector issues, rough idling, or poor fuel economy. Safe for all turbo diesel engines with or without particulate filters. For heavy soot buildup, combine with regular driving above 60°C exhaust temps to aid natural cleaning.

Practical Benefits: Expect smoother running, easier cold starts down to -20°C, lower fuel use by optimizing spray, and reduced repair costs from clogs.

FAQ

Can I use it in modern DPF diesels? Yes, it's fully compatible and helps maintain filter efficiency without disassembly.

How much for my tank? One 500ml bottle handles up to 70 liters; use during filter change for best results over 2,000 km.

Is it safe for daily drivers? Absolutely, add at every service for quieter operation and corrosion protection year-round.