After a near-six hour stretch of green flag running was brought to an end by a shunt for the High Class Racing LMP2 car of Anders Fjordbach in hour 21, the two Chip Ganassi Racing Cadillac V-LMDhs and the MSR Acura ARX-05 were bunched together by the ninth full-course caution of the race.
Prior to that, Scott Dixon aboard the #01 Cadillac had been some 50 seconds clear of Simon Pagenaud in the Acura, which was still losing time in the pitstops having to top up its oil following the car's earlier dramas.
