Motul SportsCar Grand Prix 2025

At one of the most historic and fan-beloved venues on the IMSA calendar, the 2025 Motul SportsCar Grand Prix at Road America delivered classic American prototype racing – high speed, strategic intrigue and relentless competition from a deep prototype field. Over the 2-hour 40-minute contest the No. 31 Whelen Cadillac V-Series.R entry from Action Express Racing showcased its ongoing development and pace even in the face of tough rivals.

While outright victory ultimately went to a well-executed race from BMW M Team RLL, which scored a strategic 1-2 finish at the 4.0-mile Wisconsin road course, the No. 31 Cadillac was consistently competitive throughout the event and ran strongly inside the top tier of GTP contenders. The weekend underscored how razor-thin the margins are in IMSA prototype racing and how vital strategy and energy management have become in this ultra-close championship.

For Action Express, Road America was an important barometer of pure race pace and mid-season performance. The team extracted valuable data on aerodynamics, tire wear and stint balance from the fast sweeping corners of Road America – insights that would pay dividends later in the season as the team sharpened its approach toward longer endurance rounds. Even without a podium result, the strength of the No. 31 Cadillac through qualifying and race laps illustrated its potential across diverse track layouts.

The challenges at Road America — from early-race yellow flags to strategic position swaps — served as a vivid reminder that success in IMSA isn’t just about one lap of speed, but about teamwork, execution and learning from every mile completed. For Action Express Racing, the performance by the No. 31 crew and car reinforced confidence in the program’s competitive trajectory at this crucial point of the 2025 WeatherTech Championship.