Purpose and Specifications

LIQUI MOLY 4012 Valve Protection for Gas Vehicles is a premium fuel additive designed specifically for cars running on autogas (LPG or CNG), including bivalent systems. This 1-liter formula protects engine valves from wear and overheating in the cylinder head area, ensuring smooth lubrication and complete combustion for reliable performance.

Key practical benefits:

• Lubricates valves to prevent damage and costly repairs
• Maintains full engine power and compression over 100,000+ km with regular use
• Handles high pressures and peak temperatures up to 900°C in the combustion chamber
• Safe for catalytic converters and turbochargers - no heavy metals
• Self-mixing, economical for continuous use in all standard dosing systems

Packaged in a sturdy 1-liter carton for easy storage; shelf life of 3-5 years unopened.

When to Use / Replace?

Use continuously in gas vehicles to protect valves from dry-running damage common after 20,000-50,000 km on LPG. Add directly to your dosing device reservoir - LIQUI MOLY recommends 6-8 drops per minute for vacuum-controlled systems. Top up every 3-6 months or 10,000-15,000 km based on driving conditions. Replace the additive reservoir fluid annually to keep protection strong.

FAQ

Is LIQUI MOLY 4012 safe for my catalytic converter?
Yes, it contains no organometallic compounds and is fully tested safe for catalytic converters and turbochargers.

How much do I need for my gas car?
The 1-liter bottle lasts 6-12 months with recommended 6-8 drops per minute dosing, covering 20,000+ km.

Can I use it in converted petrol-gas cars?
Absolutely, it's perfect for retrofit bivalent systems to prevent valve recession and power loss.