Purpose and Specifications

LIQUI MOLY Diesel Particulate Filter Protector is a premium fuel additive designed to protect your diesel particulate filter (DPF) by ensuring cleaner combustion and reducing soot buildup. This 250 ml can treats 50-75 liters of diesel fuel, making it perfect for regular maintenance in city driving or short trips where DPF regeneration is harder to achieve.

Key practical benefits:

• Lowers the regeneration temperature by over 100°C (more than 200°F), helping the DPF self-clean at everyday driving temps instead of needing 550°C
• Cuts soot formation to prevent clogging and extend DPF life, avoiding costly replacements every 100,000-200,000 km
• Boosts engine performance, lowers emissions, and improves fuel efficiency
• Ideal for short-distance and stop-go city vehicles

Add every 2,000 km just before refueling for long-term protection. Shelf life is typically 3-5 years when stored cool and dry.

When to Use / Replace?

Use this protector every 2,000 km or monthly for frequent short trips to keep your DPF clear and regenerating properly. If your dashboard shows DPF warnings or you notice power loss, add it immediately before a longer drive to trigger cleaning. Replace the DPF only after 150,000+ km if cleaning fails, but regular use can double its service life.

FAQ

Can I use it in all diesel engines? Yes, it's safe for all modern diesel vehicles with DPFs, especially cars, vans, and short-trip drivers.

How often should I add it? Every 2,000 km or before each fill-up in city use—one 250 ml bottle per tank.

Will it fix a clogged DPF? It prevents and aids regeneration; for heavy clogs under 40°C, pair with a professional cleaner first.