Liqui Moly MOTOR CLEAN (THE OLD ENGINE FLUSH) is a high-tech ceramic wear protection product for all engines and motor oils. Liqui Moly Motor Clean Engine Treatment is a product of Liqui Moly (GmbH), headquartered in Ulm in southern Germany. Liqui Moly manufactures lubricants and many other superbly engineered and formulated automotive products.

Today’s extended oil change intervals, smaller oil sumps, inadequate fuel quality, and lean burning engines can lead to the formation of the “dreaded black sludge” in modern engines. Liqui Moly Motor Clean’s highly effective detergents and dispersants dislodge the sludge and lacquers, and keep both solid and liquid contaminants in suspension until they are drained with the used motor oil during your oil change. After carrying out this type of prepared oil change, the fresh oil is able to realize its full performance potential .

Application: Add Liqui Moly Motor Clean to your engine oil BEFORE the oil change. After approx. 10 minutes idling, drain used oil, change the filter and fill with fresh oil. Liqui Moly Motor Clean comes in a can of 500ml (17ozs or ½ quart.) which is sufficient for engines holding 4 to 6 quarts of oil.


Lean burning Engine?
Small Oil Sump?
Extended oil Change?

Well, if it cleans, it cleans.

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77' 300D, "Cartman" SOLD @ 150K (didn't know what I had)
83' 300SD, "The Superdon" 325k+ @ 28mpg
95 E320 wagon, "Millennium Falcon" 231k+ @ 24 Mpg
95 E300D, "Sherley" 308k @ 33.69 Mpg, currently anticipating a head
99 Suzuki Intruder "Trudy" @ 45 mpg