Current Australian Supercars Champion Chaz Mostert will be back behind the wheel of a GT3 machine this weekend, stepping into the #15 Vasser Sullivan Lexus RC F GT3 for the Detroit Grand Prix.
It will be Mostert’s first IMSA Sprint round, after cameo appearances in the IMSA Endurance rounds, including a GTLM class win at the 2020 Daytona 24 Hours.
DSC caught up with Chaz at the recent GTWC Australia round at The Bend to chat about the opportunity.
“It was a connection through TRD [Toyota Racing Development],” Chaz said. “It was an opportunity to collab, and there was a gap in the Supercars calendar, and luckily there was a spot available”
Mostert’s team – Walkinshaw TWG Racing – have become the factory-supported Toyota Gazoo Racing squad for the 2026 Supercars season, running the Toyota GR Supra, and making Mostert part of the Gazoo Racing stable.
“It’s a pretty cool story – it doesn’t look like it’s going to affect the (GTD-Pro) championship too much, but it’s an opportunity to go over and see what the Lexus GT3 is like!”
Mostert’s addition to the #15 Vasser Sullivan Lexus alongside Aaron Telitz moves the car from GTD to GTD-Pro, giving Vasser Sullivan a second ‘bullet’ for Lexus at Detroit.
The Lexus RC F will be the fifth GT3 machine that Mostert will have driven; he started his GT3 career with BMW in the M6 GT3, before runs at the Bathurst 12 Hour in an Audi R8. He won the GTWC Australia championship in an Arise Racing Ferrari 296 GT3, and last year took second in class at the Daytona 24 Hours with Kenny Habul’s SunEnergy 1 Mercedes AMG.
Despite his experience, on a normal GTWC Australia weekend, Mostert isn’t behind the wheel of a car. Instead, he’s running his own racing operation: Method Motorsports.
“[Method Motorsports] has certainly grown – we’re into year three for us as a new team,” Mostert said. “It’s pretty cool across all three different categories inside the GT4 series, with Silver, Silver-Am and Am.
“I’m pretty proud with the diversity of the cars we have, and the diversity of the drivers we have, and our awesome backers as well.”
Method Motorsports started as a two-car operation, running two McLaren Artura GT4’s in the first season of the Monochrome GT4 Australia, to now featuring 6 cars across three brands and three classes. At The Bend, Method Motorsports were running three McLaren Arturas, two Porsche Cayman 718s, and a Ford Mustang.
It has been a successful venture so far – in the two full seasons of GT4 Australia, Method Motorsport cars have taken 9 overall wins, 5 Am-Class wins, and the overall championship twice. This season however, it’s been a tougher start to the campaign – despite two race wins so far in 2026, the top Method Motorsport car is 4th in the Silver class.
“We’ve had some success over the last year which has been really good. It also makes it a bit hard sometimes because you expect the same year in, year out.
“This year the competition is absolutely through the roof [in GT4 Australia] – 33 Cars, it’s absolutely stacked with amazing drivers, so it always makes the task that bit harder.
“The hardest part when you’re running six cars, you want all six cars to get the same result!”
For Chaz, Method Motorsports is a pathway to continue his involvement in motorsports beyond driving. He found a partner in his manager and motorsport lawyer Guy McEntyre, and GT4 Australia provided the right platform to bring the plan to action.
“I didn’t really know what I should do after racing – all I do know is racing,” Mostert said. “That pretty much summed up, the decision to start our own thing.
“And then GT4 SRO was a chance to be a thing here in Australia, and it was a category that really made sense for me.”
After a season in 2024 of pairing Team Owner duties with his own Championship winning GTWC Australia campaign, Mostert stepped back from driving duties to give ‘100% focus’ to running Method Motorsport.
“For me, you’ve got to put 100% focus on those race weekends, and definitely, that first year it felt like it was a bit too hard to manage racing, and focussing on that side of things as well, instead of trying to help our awesome team.
“You’ve got to spend 100% on this side [as a team owner] if you’re going to be doing it.”
As far as that leaves Mostert’s GT3 career, are we likely to see Mostert return to a full-time factory GT drive?
For now, at least, Mostert doesn’t think so.
“At that time [in 2019, with BMW], I had the time to do it – I just don’t have the time now.
“I do so much, getting ready for the GT4 season and our team, and what I do in Supercars, that’s already 20 race weekends of the year.
“So for me, you’ve got to have that balance.”
But that doesn’t mean you won’t see Mostert behind the wheel of GT machinery at all. Especially with the brand-new Toyota GR GT3 on the horizon.
“I think it’s a fantastic car, and I’m really keen to see how it goes next year!
“[If it comes to the Bathurst 12 Hour] I’ve got my hand up, and we’ll just have to wait and see.”
