The wall, which was an oval shape, was 15 miles (24.14 km) in circumference and about 4 miles (6.44 km) in diameter on one way and 6 miles (9.66 km) on the other way.
The simple answer is YES.
In August 1963, Dr. W.R. Stanton, who was Principal Scientific Officer of the Ministry of Agriculture, Northern Nigeria, and Frank Willet...
Willet, who had carried out excavations at the Old Oyo in 1956/1957, also wrote that "Old Oyo is 40 miles (64.37 km) North-North-West of Ilorin".