Engine flush is a chemical additive that is added to a vehicle's engine oil with the intention of removing sludge, dirt, and other contaminants. It is Typically used before an oil change, with the goal of improving engine performance and extending the life of the engine. Engine flush works by dissolving and dispersing built up deposits, allowing them to be drained out of the engine along with the old oil.
While engine flush can provide benefits in removing harmful deposits, it's important to use them correctly and adhere to the manufacturer's instructions. Excessive or incorrect use of engine flush can potentially cause damage to the engine, so it is recommended to consult with a trusted mechanic or follow the vehicle's owner manual for proper guidance on when and how to use an engine flush.