LIQUI MOLY Oil Sludge Flush – Deep Clean Before Every Oil Change LIQUI MOLY Oil Sludge Flush is a special combination of oil-soluble detergents and thermally stable dispersants for the fast, easy removal of black sludge and other combustion by-products from the engine and crankcase before an oil change. Removes Black Sludge: Clears combustion by-products from the crankcase. Gently Cleans Oil Passages: Clears oil holes, screens and ducts. Increases Reliability: Prevents lubrication problems from clogged passages. Prepares for Fresh Oil: Sets up your engine for maximum performance from new oil. Application Instructions: Add to the old engine oil while it's still in the engine. Run the vehicle as normal for a while to let it work through the oil. Drain the oil and change the filter as usual. Follow up with an engine flush just before draining for the best result. Best For: Petrol and diesel engines. Vehicles with visible engine sludge or infrequent oil changes. Anyone wanting the deepest possible clean before fresh oil. Give your engine a genuine deep clean with LIQUI MOLY Oil Sludge Flush. Order today and set up every oil change for success.