The European Tour confirmed his round as the lowest number of putts for 18 holes in any tour event. The record comes a week after the tour celebrated its 40th anniversary.
Del Moral birdied his last three holes to move to 17-under for the tournament on the Santo da Serra course.
The Valencia-born Del Moral, who is seeking a first win on the European Tour, made nine one-putts over the back nine.
Rookie Joakim Lagergren (70) birdied the 18th hole to move to 14-under, a shot clear of a four-way tie between Mikael Lundberg (64) and Magnus Carlsson (71), Ricardo Santo (68) and Wilson (72).
Wilson started the day with the lead after bogey-free rounds of 66-65. Wilson had three bogeys on Saturday.