When it is time for an oil change, most car owners focus only on the new oil, while the condition inside the engine matters just as much. Sludge, varnish, and residue from old oil can still cling to the engine walls and oil passages even after the old oil is fully drained. This is where an engine flush comes in.

Why Does Old Oil Residue Need to Be Cleaned?

Every engine oil contains a different additive package depending on the brand. When switching oils, especially to a different brand or type, leftover residue from the old oil can interfere with how well the new oil's additives perform. As a result, the new oil does not work at its best from the very first minute it is poured in.

This effect is more noticeable in vehicles that skip regular servicing, that mostly run stop and go in city traffic, or that are switching oil brands for the first time. The longer sludge builds up, the more likely oil passages become partially blocked, which can reduce lubrication effectiveness over time.

Benefits of Using an Engine Flush

  1. Dissolves sludge and varnish clinging to the engine walls.
  2. Keeps oil passages clean, so lubrication works at its best from the moment the new oil goes in.
  3. Helps extend the life of internal components by reducing friction caused by residue.
  4. Makes the oil change more thorough, since sludge drains out with the old oil instead of settling and mixing into the fresh oil.

How to Use It Correctly

Reiniger Engine Flush is poured into the engine through the oil filler cap while the old oil is still inside. The engine is then run at idle for 5 to 10 minutes according to the instructions on the packaging, before being drained along with the old oil and refilled with fresh oil. The German precision formula is designed to clean thoroughly without damaging seals, as long as the recommended idle time is followed and the vehicle is not driven while the flush is still inside the engine.

This product can be used on both petrol and diesel passenger engines, making it a practical addition to any oil change routine, especially when switching oil brands or after a longer than usual interval between services.

Ready to clean your engine before the next oil change?
Check out the full details for Reiniger Engine Flush, or buy directly on Shopee / Tokopedia.