• Motul Valve Expert is a lead replacement additive suitable for all old engines fitted with soft exhaust valve seats.

For all engines - Cars, bikes, marine, lawn mowers etc Motul Valve Expert is a lead replacement additive suitable for all old engines fitted with soft exhaust valve seats which require lead in the Petrol to lubricate and protect from recession, including: cars, bikes, boats, gardening engines The phosphorus formulation provides outstanding valve seats lubrication and protects from recession. Better performance than potassium based products and petrol Press on the bottle to fill the upper container and pour the right dosage in the Petrol tank before refilling with unleaded petrol, it's as simple as that. Please Note: Must not be used with engines fitted with catalytic converters. Dosage recommendation: Treatment AmountML of Valve Expert to use 10L10ml 20L20ml 50L50ml 250L250ml