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- CASTROL Valvemaster Plus Octane Boost
Lead replacment fuel additive for use with octane boost for use with lead-free fuel. Protects engine against valve seat recession under all diving conditions. Keeps fuel system clean and protects against corrosion. Castrol Valvemaster Plus provides an octane boost to unleaded fuel, reducing pinking, knocking or the need to retune. One millilitre treats one litre of fuel - one bottle treats 250 litres of fuel.
