Engine is flushed 2 times, 15 minutes
each, with engine running at idle speed.
ECF72 color after flushing. On the left is 1st
flush, right bottle is 2nd flush.
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Notice the sludge & other deposits that is still stuck to the wall
of the left bottle (1st flush). Right bottle
has less sludge and oxidised carbon.
Sludge, carbon deposits, metal dust and harmful particles, all flushed out from the engine.
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