For most of his Cup Series career, Tony Stewart had the General Motors Brand by his side, one way or the other. He drove a Chevy car when running with Joe Gibbs Racing, and when they switched allegiances to Toyota, Stewart joined Haas Racing to continue driving the Chevrolet car.

After he became the co-owner of the team, turning Haas Racing to Stewart-Haas Racing, the team decided to switch to Ford Performance and continued running their engines. However, the time for the partnership is now up, with TSR parting ways with Ford.

Tony Stewart’s Team Announces Split With $40 Billion Worth Engine Supplier

Following the 2024 season, SHR announced its closure owing to financial struggles. Stewart remained connected to the racing world, running for his own team known as “Tony Stewart Racing.” He drives in the NHRA Top Fuel and also fields a car in the “World of Outlaws.”

Donny Schatz is the driver in charge of the No. 15 TSR car in the World of Outlaws, and for more than nine years, Ford Performance, which has a net worth of nearly $40 billion, has been the engine provider for the team.

The TSR-Ford partnership has been incredibly successful for Schatz, who raced to victory on 22 occasions while running the FPS410 engine. Notably, the driver has also played an integral part in developing the engine for the last five years.

However, all of that is now in the past, with TSR making a mid-season switch in its engine provider lineup. In a statement released on X, TSR revealed they will no longer be running a Ford power unit for the rest of the 2025 season.

With Ford out, Stewart’s team will return to an old ally of the veteran, with a Chevrolet Block 410 under the hood of the No. 15 car.

Reportedly, the issue with the Ford engine was the fact that the power unit was producing too much power. The added horsepower made driving the car more difficult, severely affecting Schatz’s results.

In 2019, Schatz had 11 wins to his name, marking the last time he had a double-digit winning season. A year before that, he had 22 wins in a single season, proving just how dominant he can be when handed the right package.

Notably, the 47-year-old has won 318 races and 10 championships in his career, but his performances have gone downhill while driving with a Ford PU. The 2025 season has further highlighted his struggle with the engine, given he is yet to win a race this year.

He has one top-five finish and seven top-tens and sits 200 points away from the lead in the drivers’ standings.

From the next race onwards, that is the World of Outlaws Sooner State Showdown at the Lawton Speedway on Friday, March 28, Schatz will be running on a Chevy PU. He’ll be hoping for a much better outing than what he has had so far this season, and who knows, perhaps the reignited partnership might just be the spark that Schatz needed to get his season back on track.