Liqui Moly’s DIJectron is an additive that reduces the risk of low-speed pre-ignition (LSPI). DIJectron contains polyetheramine as an active ingredient, an effective cleaning chemical that removes stubborn deposits from injectors, pistons, and combustion chambers. If used regularly, it provides lasting protection against new carbon deposits. DIJectron can be used at any inspection. It only has to be added every 2,400 miles. It is suitable for all vehicles with a 4-stroke gasoline engine, especially for direct injectors but also for vehicles with intake-manifold injection.