The mechanic listed an oil change as part of the inspection, even though the aircraft had been flown just 12 hours in the last 12 months. The owner insisted it did not need an oil change since the manufacturer recommends an oil change only every 50 hours. He completely disregarded the other part of the manufacturer’s recommendation: “Every 50 hours or four months, whichever occurs first.”
Source: general aviationHow often should you change your airplane’s oil?