It was the Southern Hawke's Bay man's best performance, following three months working with and learning from Oldfield in the UK.
On Saturday, Oldfield had also finished third in the intermediate machine shearing final.
While today's final was missing such regular opposition as England father-and-son pair and World Championships representatives George and Andrew Mudge and the top Welsh shearers, it was a tough day.
"Some of the sheep had a bit of cotty wool around the necks," Oldfield said. "They were tough sheep for competition, especially with the blades. That's why our times were fairly slow."
Oldfield will have nly a short stop at home before heading to the Falkand Islands in August, to shear more sheep, with Argentina and Australia also on the itinerary for the rest of the year.
"It's been a great way to travel around the World and meet genuine people everywhere I go," he said. "I'm really happy to have met so many great people. I'm already looking forward to coming back to the UK again next year."
Result:
Royal Highland Show:
Blade shearing final (6 sheep): Allan Oldfield (Geraldine, NZ) 21min 4sec, 94.533pts, 1; Wilson Wyllie (Scotland) 25min 32sec, 102.766, 2; Michael Churchouse (Dannevirke, NZ) 21min 42sec, 110.767pts, 3; William Craig (Scotland) 26min 25sec, 111.917pts, 4; Mark Armstrong (Scotland) 26min 1sec, 113.05pts, 5; Jimmy Wright (Scotland) 19min 56sec, 114.3pts, 6.