Purpose and Specifications

The LIQUI MOLY 5129 Fuel System Cleaner is a premium 300 ml additive designed to deep clean your gasoline engine's entire fuel system, from injectors to combustion chambers. It removes stubborn deposits that cause rough idling, poor acceleration, and high emissions, restoring smooth performance and fuel efficiency. Safe for catalytic converters and all gasoline engines, including direct injection and turbocharged models.

• One 300 ml can treats up to 75 liters of fuel – perfect for a full tank.
• Cleans injectors, prevents corrosion, and ensures optimal fuel mixture for better combustion.
• Lowers fuel consumption and pollutant emissions while boosting engine power.
• Shelf life: 4 years unopened when stored in a cool, dry place (0°C to 30°C).

When to Use / Replace?

Add every 2,000 km preventively or anytime you notice hesitation, increased fuel use, or check engine lights related to fuel delivery. Ideal during oil changes or fuel system maintenance. Effects last up to 2,000 km; repeat as needed for heavy deposits. Pour directly into your fuel tank before filling – it mixes automatically.

Pro Tip: Use in modern cars with direct injection to fight carbon buildup that reduces power over time.

Frequently Asked Questions

Q: Is it safe for my catalytic converter?
A: Yes, fully tested and safe for all cats, turbos, and hybrid gasoline engines.

Q: How often should I use it?
A: Every 2,000 km (about 1,200 miles) for maintenance, or more if performance drops.

Q: Can I use it in older cars?
A: Absolutely – works on all gasoline injection systems to prevent corrosion and keep injectors clean.