TetraBOOST E-Guard Road is a potassium-based lead replacement, octane booster and ethanol corrosion inhibitor. Designed for cars without hardened valve seats, to give protection from problems resulting from modern ethanolised petrol. Application: One 50ml bottle for up to 50 litres of fuel. User Benefits: Protects against ethanol induced corrosion Inhibits valve seat recession Raises octane by up to 2 points.

TetraBOOST E-Guard Road is a potassium-based lead replacement, octane booster and ethanol corrosion inhibitor. Designed for cars without hardened valve seats, to give protection from problems resulting from modern ethanolised petrol. Application: One 50ml bottle for up to 50 litres of fuel. User Benefits: Protects against ethanol induced corrosion Inhibits valve seat recession Raises octane by up to 2 points.