All old engines fitted with soft exhaust valve seats which require lead in the gasoline to lubricate and protect from recession: cars, bikes, boats, gardening engines… Must not be used with engines fitted with catalytic converters.

The phosphorus formulation provides outstanding valve seats lubrication and protects from recession. Better performance than potassium-based products and gasoline.

Press on the bottle to fill the upper container and pour the right dosage in the gas tank before refilling with unleaded gasoline. Unleaded gasoline Valve Expert Unleaded gasoline Valve Expert 10 L 10 ml 2 US Gallon 0.25 fl oz 20 L 20 ml 8 US Gallon 1 fl oz 50 L 50 ml 16 US Gallon 2 fl oz 250 L 250 ml (1 can) 66 US Gallon 8.4 fl oz (1 can)