Unlike almost all fuel system cleansers Faher fuel treatments incorporate significant lubrication with dramatic effects. It counters the tendency to "dry out" components. This is a critical benefit as it protects and preserves seals, rings etc. The Petrol Cleanser absorbs moisture, often caused by condensation and contains a lead replacement to further protect valve seats and valves. The Petrol Cleanser acts as an octane boost whilst the Diesel Cleanser also acts as a cetane boost.