Oldfield Motorsport confirms USA star Jason Conzo in GB4 line-up for opening rounds Oldfield Motorsport confirms USA star Jason Conzo in GB4 line-up for opening rounds Bas Kaligis / Friday, February 10, 2023 0 672 Article rating: 3.0 Race-winner Oldfield Motorsport has confirmed that American single-seater ace Jason Conzo will drive for the team in the opening two events of the 2023 GB4 Championship. Read more