Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. 1968 was the second and eventually the final year the controversial turbine cars were running in the 1968 race classic. In qualifications, Graham Hill the 1966 champion in the #70 STP Turbine is first to qualify, and sets a new qualifying record! Later, his STP turbine teammate Joe Leonard in #60 wins the pole position with a speed of 171.559 mph (276.097 km/h). At the drop of the green flag, Joe Leonard in the #60 STP Turbine leaps in the lead, with Bobby Unser in second and Roger McCluskey up to third at the end of lap 1. After only nine laps, Jim Hurtubise in the PepsiCo Frito-lay special has burned a piston, and is out, finishing 30th. About this time, Bobby Unser is now hard after Leonard, and at the end of the main straightway he passes to take the lead. On lap 41, the caution flag flies for the first time when Al Unser loses a wheel and hits the first-turn wall, with Arnie Knepper and Gary Bettenhausen also involved. After 200 miles (320 km), A.J. Foyt is out with a blown engine and the defending champion's bid for his 4th Indy win is over for this year.

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