Late in the race, Wilbur Shaw held a comfortable lead, and had lapped second place Ralph Hepburn. With about 20 laps to go, however, Shaw's car had been leaking oil, and had nearly lost nearly all of the oil out of the crankcase. In addition, the right rear tire was heavily worn. Shaw slowed down considerably in an effort to nurse his car to the finish line. Shaw and his riding mechanic John "Jigger" Johnson were both suffering from burns due to the leaking oil. Second place Hepburn realized Shaw's problems, and began a charge to catch him. He unlapped himself, and went on a tear in hopes of victory.