dhuber, that's 1000 laps, 500 miles I believe.
You can bet Ford is gong to throw every little trick they know at this attempt. 500 miles at 31 mpg gives 16.13 gals required. Stoping to change drivers would drop it down.
2015 Stage 3 Roush
'66' Ranchero w/almost done 302 T-5 swap
2000 4x4 Ranger
2003 4x2 Ranger
'69' Fairlane Cobra, 428 4-speed waiting for work