2023 Australian Formula Open Series

The 2023 Australian Formula Open - powered by Racefuels was a multi-event open-wheel single seater motor racing championship. This was the inaugural season of the championship, founded by two-time Australian Gold Star winner Tim Macrow as a direct successor to the Australian Formula 3 championship.

Drivers competed to win a S5000 test and free entry to a race in the S5000 Championship in 2024 or later.

Trent Grubel, driving for Tim Macrow Racing, won the overall championship and with it the AFO1 class championship, three points ahead of his teammate Ryan How. Matthew Roesler, driving for his privateer State Fleet Services team, won the AFO2 class championship, while AGI Sport's Kristian Janev was victorious in the AFO4 class.