This STP\u00AE formulation contains the highest level of detergents of any STP\u00AE formula\nIt helps clean entire fuel systems to restore its optimum operating condition\nThe advanced formula helps clean fuel injectors, carburettors, intake valves and ports, combustion chambers, cylinder heads and piston tops\nRestores lost power and acceleration\nReduces hard starts and engine hesitation as well as knocks and pings\nOver time your vehicle engine can become tired and a loss of performance can result. This is why it is important to maintain your engine by using a proven fuel additive. STP has developed a large range of products designed to restore performance and prolong its life. This particular additive is a complete fuel system cleaner designed for use with diesel engines. The formulation can restore lost power and acceleration, as well as reducing hard starts and engine hesitation. Comes in a 400ml bottle. STP stands for Scientifically Treated Petroleum. Formed in 1954 in the Una