Purpose and Specifications

MOTUL Valve Expert 250ml is a premium petrol fuel additive designed to clean valves and combustion chambers while providing essential lubrication for classic engines. Its phosphorus-based formula replaces the lead from old petrol, protecting soft exhaust valve seats from wear and recession during high-heat operation up to 900°C.

This additive treats up to 250 liters of petrol (1ml per liter), making one bottle perfect for regular maintenance. Use it in classic cars, motorcycles, boats, gardening equipment, and farm machinery without catalytic converters. Built-in dosing chamber ensures easy, accurate addition before refueling.

• Cleans deposits from valves and chambers for smoother running
• Lubricates valve seats to prevent costly recession
• Boosts engine performance and efficiency
• Shelf life: 5 years unopened, use within 2 years once opened

When to Use / Replace?

Add every 250-500 km or with each tank for classics running modern unleaded petrol. Replace if you notice rough idling, power loss, or valve noise – early use prevents repairs costing thousands. Ideal for engines pre-1990 without cats.

FAQ

Q: Can I use it in modern cars?
A: No, avoid engines with catalytic converters as it may damage them.

Q: How much for my tank?
A: 10ml per 10 liters – fill the dosing chamber and pour in before fuel.

Q: Does it improve performance?
A: Yes, cleaner valves mean better combustion, less knocking, and more power.