Liqui Moly Pro-Line Direct Injection Cleaner is a modern fuel additive with polyetheramine technology that thoroughly cleans the fuel system, pistons, and combustion chambers, reducing the risk of low-speed pre-ignition (LSPI). Suitable for all 4-stroke gasoline passenger cars, one 120 ml can treats 30 to 50 liters of fuel and should be added every 5,000 km for optimal performance, mixing automatically with the fuel for hassle-free use.