LIQUI MOLY has provided an example of how its engine cleaner can reduce oil consumption and prevent the need for expensive repairs in older vehicles. 

Often in higher mileage engines the piston rings no longer seal properly, resulting in dirty combustion, which produces even more deposits. 

LIQUI MOLY provides an example of an Audi A5 2.0 TFSI model from 2011 with 81,435 kilometres on the clock. The owner complained of the continuously increasing oil consumption, which had reached 1.5 litres/1000 kilometres. An Audi workshop had quoted €4700 for the repair work. 

Dietmar Schmid, Applications Engineer at LIQUI MOLY said, “Considering the mileage, it was suspected, that dirt in the engine contributed to the high oil consumption.”

Dietmar recommended Pro-Line Fuel System Cleaner to remove contamination from the fuel and injection system. This dissolve deposits on the injection nozzles and ensures that the fuel is again atomized finely allowing it to burn cleaner. The oil circuit was then purged with Pro-Line Engine Flush to dissolves sludge and deposits which are then drained together with the old oil. Finally the contamination in the intake system was removed with Pro-Line Throttle Valve Cleaner, allowing the engine to breath freely again.

In addition, friction in the engine was reduced. For this purpose, CeraTec was added to the fresh oil during the oil change as a high-tech wear protection additive. 

After a short test drive, the compression was measured again. The value had improved between 0.5 and 1.5 bars on all four cylinders. Inspection with an endoscope showed that the combustion chambers were now significantly cleaner and wet spots were no longer visible on the piston crowns.

After driving 600 kilometres the driver said, “Before it would have been necessary to add oil some time ago, but now the oil consumption is nearly zero. And this success cost less than five percent of the initially estimated repair costs.”

Dietmar added, “This is an excellent way for workshops to secure customer loyalty. Not only does it solve the problem, it does it for a fraction of the cost quoted by the competition. This spreads quickly by word of mouth. Additives are not a panacea for revitalizing defective engines, but they are useful chemical tools, every good workshop should keep in their toolbox.”

LIQUI MOLY cleaners and additive are available from stockist nationwide.