Bardahl 5 in 1 Cleaner Petrol Engine SpecificationsBardahl 5 in 1 Cleaner Petrol Engine cleans the engine by precisely targeting the parts most susceptible to clogging thanks to its multi-purpose formula. It also protects the injection system exhaust valves turbo catalytic converter and EGR valve of engines running on petrol. Packaged in a 1 litre bottle with 300 ml free this additive is easy to use and uses the fuel as a carrier to effectively clean the engine and its peripherals without dismantling.How to use: Pour the bottle into the tank once the low fuel light is on then add 35 litres of fuel. With the engine warm run at a constant speed of between 2 500 and 3 000 rpm for 20 minutes then drive normally. Repeat the operation several times if necessary until all the treated fuel has been used up. Refuel as normal.