10 Best Engine Flushes 2025

Welcome to our top 10 review of the best engine flushes. We've scoured the market for the most effective engine flushes to help you give your engine the TLC it deserves. We reviewed and scored many products in the engine flushes category, and we found products ranging from a 7.2 score up to an impressive 9.7 score. But there was one product that stood out from the rest: Liqui Moly 2037 Pro-Line Engine Flush - 500 Milliliters. Not only did it receive the highest score on our list, but it's also a fan favorite among car enthusiasts. Liqui Moly's Pro-Line Engine Flush is designed to remove harmful deposits and sludge buildup in your engine, leaving it clean and running like new. Don't just take our word for it - try it out for yourself and see why Liqui Moly is the most trusted name in engine flushes.