Background
The aircraft had been fully refueled eight days prior to the incident. Two days after that refueling, the aircraft was flown for 1.1 hours. This prior usage was not communicated to the student pilot.
The Flight
The student pilot, assuming the fuel tanks were full, departed and flew for approximately 4.4 hours. As he approached the airport for his final landing, another aircraft was on the runway, forcing him to execute a go-around. After the go-around, he established the aircraft on the base leg of the traffic pattern.
Fuel Exhaustion
At that point, the engine ceased operation due to fuel exhaustion. The student was unaware that the aircraft had accumulated 1.1 hours of flight time from the earlier flight, meaning the total time since refueling was about 5.6 hours. The student had only accounted for his own 4.4-hour flight, assuming it started with full tanks.
Outcome
The aircraft ran out of fuel during the go-around sequence while on base leg.