The description of this last day seems fitting because of what happened next. One of the drivers failed to set a lap because of a high speed tire failure on the final straight. The team changed the tire and sent him back out. However, when changing the differential fluid, the drain plug was only finger tightened which caused oil to leak out. The diff broke and the car was unable to finish. The team was down to just one car. They sent out driver Lance Arnold at noon because rain was predicted later. Arnold set a 7:01.3. lap time and said that he could go faster. During his second lap, however, he had a front left tire issue (like the other car) at 160 mph.