Narrative:

Lost oil pressure. Gauge indicated 0. Engine started to run really rough and so I [notified ATC] and returned to the airport for a full stop landing. Used best glide speed to ensure obstacle clearance and ended up having to do one turn over the airport to lose altitude before doing a short approach to a full stop.

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Original NASA ASRS Text

Title: C172 instructor reported returning to the departure airport following a loss of engine oil pressure and engine performance.

Narrative: Lost Oil Pressure. Gauge indicated 0. Engine started to run really rough and so I [notified ATC] and returned to the airport for a full stop landing. Used best glide speed to ensure obstacle clearance and ended up having to do one turn over the airport to lose altitude before doing a short approach to a full stop.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.