This product is a highly concentrated additive that cleans the engines, hydraulic systems, gearboxes and differentials. It is often expressed as "Engine Flush". The main purpose of the this concentrated product is ensuring that after an oil drain, the new oil is not contaminated with the old deposits. Therefere this product cleans the complete system and gets rid of all varnish, neutralizes acids and dissolves deposits before the oil drain. Also this product quietens noisy hydraulic valve lifters by removing the deposits. This product is competible with all mineral, semi-synthetic and full synthethic engine oils. It is also applied for non-automatic gearboxes and differentials. It is adviced to use this product before the oil drain and when the engine is warm. Let the engine idle for 20 minutes. Drain the crankcase, change the oil filter and the oil. 1 bottle of 300ml can treat up to 5 liters of engine oil. For manual transmissions and differentials it is adviced to add a maximum of 4,5% - 5% to the oil. After adding this product, drive for a few hours and then drain the lubricant.