Murillo won the 1987 Barber Saab Pro Series and the 1988 Formula Super Vee USA Robert Bosch/Valvoline Championship.
While Willy Lewis won the championship Murillo ended up ninth in the 1986 Barber Saab Pro Series season.
[1] Murillo drove in the SCCA Formula Super Vee USA Robert Bosch/Valvoline Championship for Lee Hagen Racing.
He raced his Volkswagen powered Ralt RT5 to victory at Phoenix International Raceway, Mid-Ohio Sports Car Course and Nazareth Speedway.
Together with Tod Gartshore, Charlie Henry and Ron Tambourine Murillo participated in the Toronto Star 24-Hour World Challenge.