Piper PA-28-181 Archer

The University of North Dakota had reported ‘abnormal exhaust valve recession’ before reverting back to 100LL aviation fuel.

There can be many reasons for running low on fuel sooner than expected: headwinds that prolong a flight, tailwinds that make you optimistically skip a planned stop, tanks not filled to the brim, too rich a mixture, a miscalculation in flight planning.