2018 Oak Tree Grand Prix

[1] As in previous years, the event was also the second GT-only round of the IMSA SportsCar Championship season, in which only the GTLM and GTD classes were scheduled to compete.

Gunnar Jeannette substituted for Alessandro Pier Guidi in the Scuderia Corsa #63 entry due to a clash with the FIA World Endurance Championship round at Silverstone.

[6] The first practice session took place at 11:45 am ET on Friday and ended with Richard Westbrook topping the charts for Ford Chip Ganassi Racing, with a lap time of 1:42.627.

[7] The second practice session took place at 4:25 pm ET on Friday and ended with Antonio García topping the charts for Corvette Racing, with a lap time of 1:41.743.

[9] The third and final practice session took place at 8:35 am ET on Saturday and ended with Tommy Milner topping the charts for Corvette Racing, with a lap time of 1:41.205.

The competitors' fastest lap times determined the starting order with the grid arranged to put the GTLM cars ahead of all GTD entries.

Track map of VIR
Virginia International Raceway , where the race was held.