STP Engine Flush, 450ml is a powerful engine cleaning treatment designed to remove sludge, deposits, and harmful contaminants from inside your engine. Added to your engine oil before an oil change, it helps dissolve built-up gunk, improving oil flow and enhancing overall engine performance. The 450ml formula is suitable for regular maintenance, helping restore smoother operation, reduce wear, and prepare the engine for fresh oil. STP Engine Flush promotes cleaner internal engine conditions, prolongs engine life, and supports more efficient performance — making it a smart choice for proactive vehicle care and maintenance.
