Liqui-Moly Pro-Line Engine Flush is a highly effective professional-grade engine cleaning additive designed to remove harmful sludge, deposits, and lacquer build-up from petrol and diesel engines before an oil change. Formulated with advanced detergent and dispersant additives suspended in a specialised carrier fluid, this engine flush has been extensively tested in laboratories and real-world field trials to ensure fast, thorough, and safe cleaning performance.

During use, both oil-soluble and oil-insoluble contaminants are dissolved and held in suspension, allowing them to be completely drained with the old engine oil. This deep internal cleaning ensures that freshly added oil is not immediately contaminated by residual deposits, allowing the engine to operate at full efficiency, restore performance, and improve lubrication reliability.

Liqui-Moly Pro-Line Engine Flush is gentle on engine components and sealing materials, environmentally responsible, and safe for use in modern engines equipped with turbochargers, catalytic converters, and diesel particulate filters (DPFs). Its simple application and rapid cleaning action make it an essential product for professional workshops and preventative engine maintenance.