Sunday 25th May 1975
Wally Dallenbach Sr. was 20 seconds in the lead in the Indianapolis 500 when he retired on lap 162 with a burned piston. Johnny Rutherford lost the inherited lead to Bobby Unser when he pitted. On lap 171 the yellow came out for rain and the two leaders ducked into the pits for fuel. On lap 174 a downpour stopped the race and Unser was declared the winner. The rain stopped a few minutes later.
