Five hours in:

Prototype—still #22 Nissan (Pipo Durani), #7 Acura, #5 Cadillac

GTLM—still #911 Porsche (now 13th overall), #4 Corvette, #67 Ford (#3 Corvette still 9th in class)

GTD—still #86 Acura (now 21st overall), #48 Lamborghini, #93 Acura

41 of the 43 original cars still running. The #66 Ford has gotten back on track.