The 2025 Castrol Toyota Formula Regional Oceania Championship was the third season of the Formula Regional Oceania Championship, and the twentieth running of the premier open-wheel motorsport category formerly known as the Toyota Racing Series It was held in New Zealand over five consecutive weekends in January and February 2025.
The highest placed Australian or Kiwi driver after the first two rounds was awarded the Tasman Cup.
Zack Scoular, driving for mtec Motorsport, was second overall after the second round, thereby claiming that title.
All drivers competed with identical Tatuus FT-60 chassis cars powered by 2.0L turbocharged Toyota engines running on 100% fossil-free fuel.
Bold – Pole Italics – Fastest Lap † — Did not finish, but classified Each team counted its two best results of every race.