Although the rotary-engined sports prototypes generally had a reputation of being very reliable, the Mazda GTP frequently failed to finish races, and was never able to better the eighth place achieved at the 1983 24 Hours of Daytona.
[4] The Mazda GTP made its debut at the 1983 24 Hours of Daytona, where the trio of Honegger, Walt Bohren and David Palmer finished a respectable eighth, and fifth in their class.
[7] The Mazda GTP wasn't used again for another five rounds, before Bohren retired again at the Lime Rock Grand Prix; this time, he had lasted 75 laps, and was classified 32nd overall, and seventh in class.
[10] Honegger opted to drive alongside Loring and David Weitzenhof at the 1984 24 Hours of Daytona, but they crashed out after 187 laps, and were classified 54th overall, and 21st in the GTP category.
[11] The Mazda GTP then remained unused until the Lime Rock Grand Prix seven rounds later, where Honegger was able to finish the race, albeit five laps down on the winner, and in ninth place.
[21] This car made its debut in the hands of Jellinek and John Grooms at the 1986 Road America 500, where they finished 18th overall, and eighth in the GTP Lights category.
[24] This car debuted at the 1986 Lime Rock Grand Prix, where Loring finished ninth overall, and won the GTP Lights category.