CHASSIS 15 Michael Andretti began his 1991 season behind the wheel of chassis 15, successfully securing two pole positions while contesting the Gold Coast IndyCar Grand Prix at Surfers Paradise, Australia and the Toyota Grand Prix of Long Beach, California.

Unfortunately, Andretti was unable to capitalize on these front row starts, which led to two retirements.

Later in the season, the car was rebuilt for Mario Andretti.

In the legend’s hands, chassis 15 continued a successful run throughout the season, entering seven additional races.

Three podium places were secured at Toronto, Road America, and Laguna Seca; remarkably, these podiums were all shared with Michael, who stood on the top step as the race winner.

Additional point finishes were achieved at Cleveland, Nazareth, and Mid-Ohio.

Once the 1991 championship concluded, the car was adapted to house the Ford-Cosworth engine and ran over 1,000 test miles throughout the winter.

In the spring of 1992, chassis 15 entered its fina...