Lap 513 - 16:52:19 (5:02 AM) - The race-leading No. 23 Porsche and No. 02 Lexus head down pit road and make routine pit stops.

Lap 514 - 16:54:20 (5:04 AM) - The No. 01 Lexus is having oil pressure problems. The No. 7 Pontiac pits and Duno gets in. The No. 46 Corvette pits and DelVecchio gets in. The No. 81 Porsche pits and Marshall gets in.

Lap 516 - 16:57:50 (5:08 AM) - The No. 16 Pontiac pits and Smith gets in. The No. 72 Porsche pits and Henzler gets in. The No. 28 Ford pits and Rice gets in.

Lap 519 - 17:02:30 (5:12 AM) - The No. 58 Porsche pits and Law gets in. The No. 01 Lexus rejoins the field on track.

Lap 520 - 17:04:40 (5:15 AM) - The No. 01 Lexus is slow on course. The No. 5 Ford is traveling slow on course. The No. 09 Pontiac pits and Primat gets in.

Lap 521 - 17:06 (5:17 AM) - The No. 93 Porsche pits and Dave Stewart gets in. The No. 67 Porsche pits and Keith gets in. The No. 5 Ford heads to its garage with a broken front suspension.

Lap 522 - 17:08:19 (5:18 AM) - The No. 77 Ford pits and Brix gets in.

Lap 523 - 17:09:38 (5:20 AM) - The No. 02 Lexus heads to its garage, leaving the race-leading No. 23 Porsche as the only car on the lead lap.

Lap 524 - 17:12:34 (5:23 AM) - The No. 01 Lexus has retired from the race. The No. 02 Lexus came to the garage for a new alternator belt.

Lap 525 - 17:14:10 (5:24 AM) - The No. 02 Lexus returns to the track. The overall race-leading No. 23 Porsche leads the No. 60 Lexus by two laps.

Lap 528 - 17:19:49 (5:30 AM) - The No. 17 Porsche returns to the track after a lengthy stop in its garage.

Lap 530 - 17:21:50 (5:32 AM) - The No. 59 Porsche heads back down pit road for a routine stop.

Lap 536 - 17:32:38 (5:43 AM) - The No. 80 Porsche pits and Murry gets in.

Lap 541 - 17:41:20 (5:51 AM) - The No. 99 Pontiac re-joins the field on track.

Lap 542 - 17:44:13 (5:54 AM) - The No. 72 Porsche pits and Tafel gets in.

Lap 543 - 17:46:15 (5:56 AM) - The No. 60 Lexus pits and Patterson gets in, giving the No. 02 Lexus the position.

Lap 545 - 17:52:20 (6:02 AM) - The No. 39 Lexus pits and Fittipaldi gets in. The race-leading No. 23 Porsche pits. The No. 19 Ford pits and Barron gets in.

Lap 548 - 17:56:55 (6:07 AM) - The No. 40 Pontiac pits and Fellows gets in. The No. 41 Porsche pits and Will Nonnamaker gets in. The No. 02 Lexus pits and Mears gets in.

Lap 551 - 18:02:28 (6:12 AM) - The GT-leading No. 36 Porsche pits and Pobst gets in. The No. 65 Pontiac pits and Lally gets in. The No. 3 BMW pits and LaJoie gets in.

Lap 553 - 18:05:30 (6:15 AM) - The No. 22 Porsche goes behind the wall to its garage. The No. 64 Pontiac pits and Magnussen gets in. The No. 06 Corvette pits and Crescentini gets in. The No. 05 BMW pits and Milner gets in.