Purpose and Specifications

The LIQUI MOLY Lubricating Additive (5122) is a premium diesel fuel system cleaner designed to remove deposits from injectors, pumps, and valves in your diesel engine. This 0.15-liter bottle tackles rough idling, power loss, and poor fuel economy by restoring smooth performance and boosting efficiency. Ideal for all diesel vehicles, it cleans without harsh chemicals, protecting components for reliable daily driving and up to 50,000 km of extended engine life.

• Keeps fuel system clean for better combustion and fewer emissions
• Improves throttle response and acceleration
• Safely compatible with DPF filters and modern turbos
• Shelf life: 4 years when stored cool and dry (0°C to 30°C)

When to Use / Replace?

Add one bottle every 5,000 km or every 6 months during refueling to prevent buildup, especially if you notice hesitation or increased smoke. Use immediately for clogged systems causing hard starts or sluggish performance. Repeat every oil change interval for ongoing protection—no need to replace the additive itself, as effects last up to 10,000 km per treatment.

Frequently Asked Questions

Can I use this in any diesel engine? Yes, it's safe for cars, trucks, and vans with or without DPF, from everyday commuters to high-mileage workhorses.

How soon do I see results? Most drivers notice smoother running and better MPG within 100-200 km after the first tank.

Is it safe for my warranty? Absolutely—Liqui Moly meets OEM standards and won't void coverage.