FLUSH FIRST

Prior to an oil change, an engine flush can be added to the old engine oil, but how should it be applied and what does it do to the inside of the engine?

After adding an engine flush to the engine oil, such as LIQUI MOLY Engine Flush Plus, the engine must be run for 10-to-15 minutes, but do not drive the vehicle. During this time the chemical agents dissolve deposits and sludge, which are then drained together with the used oil.

What sort of chemical agents are used in your engine flush and how do you know that when mixed with engine oil, they can remove deposits and loosen sludge inside an engine?

It contains a special combination of mild solvents based on hydrocarbons, a detergent-dispersant package, and a viscosity index improver. The solvents reduce the viscosity of the motor oil, so the engine is more exposed to wear and tear. Therefore, there are also chemical anti-wear agents included, which offer additional protection to the engine.

Surely modern engine oils already include additives that help to remove carbon deposits? If so, then providing you stick to the recommended oil change intervals and use a good-quality oil, would an engine flush really make a difference?

Oh yes, it does. You’ve already done a great job in picking the correct oil and in adhering to the oil change interval. But Engine Flush Plus is simply a thorough, more intense cleaning. Imagine you have been working on your car and your hands are dirty. You can use ordinary soap to clean them, but it is more effective if you use hand-wash paste.