Purpose and Specifications

LIQUI MOLY 21317 Anti-Bacterial Diesel Additive is a powerful 1-liter tin container solution designed to kill bacteria, yeasts, and molds in your diesel fuel system. It prevents diesel pest - that jelly-like gunk from biofuel that clogs tanks in rarely used vehicles like RVs, trucks, or construction equipment. Add it to protect injectors, reduce emissions, boost lubrication, and keep your engine running smooth without costly breakdowns.

• Works in all diesel engines, including those with particulate filters
• 1 liter treats up to 300 liters of fuel
• Effect lasts up to 2,000 km
• Safe for long-term storage, even in cold down to -20°C
• Shelf life: 4 years unopened

When to Use / Replace?

Use preventively every 3-6 months or 10,000 km if your vehicle sits idle often, like seasonal RVs or work trucks. Pour in one full bottle when refueling to stop bacterial growth before it starts. Replace at next service if contamination is suspected - it decontaminates infested tanks fast. Ideal before winter storage to avoid fuel system corrosion from moisture.

Frequently Asked Questions

Is it safe for my DPF-equipped diesel? Yes, fully tested and compatible - cleans without harming filters.

How much do I add per tank? One 1L bottle for 300L fuel; effects protect for 2,000 km driving.

Can I use it year-round? Best for infrequent use or storage, but safe anytime to maintain clean fuel.