Carlube Petrol Treatment 300ml Carlube Petrol Treatment has been specially formulated to ensure maximum fuel system efficiency in all petrol engines including injection and carburettor systems. The product works by maintaining injector spray patterns and keeping carburettor jets clean. With untreated fuel, dirt and deposits can build up in carburettors, injectors, inlet ports and valves which reduce engine performance and lead to increased fuel consumption and exhaust emissions. Due to geographical locations we are unable to deliver to: Isle of Wight, Isle of Man and Ireland.