Liqui Moly Oil Sludge Flush (Öl-Schlamm-Spülung) – 300 ml | Engine Internal Cleaner | Item No. 5200

Product Overview

Liqui Moly Oil Sludge Flush is a high-performance engine cleaning additive designed to eliminate black sludge, varnish-like deposits, and oil-thickening residues from the entire lubrication system. It works where cheap “miracle cleaners” panic and give up—inside oil passages, strainers, piston ring grooves, and internal channels.

This additive is engineered to restore oil flow, prevent lubrication starvation, and improve engine reliability, especially in engines suffering from frequent short trips and extended oil change intervals.

In short: if your engine oil looks like espresso instead of honey, this is the intervention it needs.

Key Benefits

• 🛢️ Removes black oil sludge and stubborn deposits
• 🔧 Cleans oil channels, bores, strainers & piston ring grooves
• 🚗 Restores proper lubrication and oil circulation
• 🧠 Prevents expensive engine repairs caused by oil starvation
• 🔥 Reduces deposit agglomeration from combustion by-products
• ⚙️ Improves engine reliability and longevity
• ✅ Gentle, safe, and non-aggressive formulation

Economical, effective, and brutally honest in performance.

How Oil Sludge Forms (The Real Culprits)

Oxidation

Heat + oxygen = oil degradation.

Result? Acids, resin-like varnish, and sludge deposits.

Nitration

Nitrogen oxides (NOx) from combustion sneak into the crankcase as blow-by gases.

Result? Oil thickening and black sludge formation.

Sulfation

Sulfur oxides (SOx), combined with condensation, form sulfurous acids.

Result? Further oil thickening and internal contamination.

The Final Verdict

These contaminants do not evaporate.

Short trips make it worse because the oil never reaches proper operating temperature. Sludge keeps building—silently and expensively.

Application Instructions

• One 300 ml can treats up to 5 litres of engine oil
• Add to engine oil 100–300 km before the scheduled oil change
• Drive normally (no full throttle heroics)
• Drain oil and replace engine oil + oil filter
• For extreme contamination, repeat the process
• If necessary, manually clean the oil strainer in the oil pan
• Can be used before every oil change

Simple. Controlled. Effective.

Compatibility

✔ Suitable for petrol & diesel engines

✔ Compatible with turbocharged engines

✔ Safe for catalytic converters & DPF systems

✔ Safe for vehicles with oil-immersed timing belts

❌ Not suitable for motorcycles with wet clutches

Technical Data

• Brand: Liqui Moly
• Product Type: Engine Oil System Cleaner
• Content: 300 ml
• Item Number: 5200
• Oil Capacity Coverage: Up to 5 litres

Why Use Liqui Moly Oil Sludge Flush?

Because sludge doesn’t ask for permission before destroying oil flow—and engines don’t forgive neglect. This is preventive maintenance, not cosmetic care.

Clean oil channels =

✔ Better lubrication

✔ Lower wear

✔ Fewer breakdowns

✔ Longer engine life

Simple chemistry. Serious results.