Can we use expired engine oil i.e AeroShell sport plus4  for flushing of engine Rotax 914 ?Once it flushed, 2nd time use fresh engine oil for normal uses.

As the Aircrafts installed 914 Quarantine for more than  8  months for long storage in open air. Ambint temperature was 45 C +.

Engine was also not preserved before long stay.


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