Most of the engines , including those used for the Indy 500 , are used for multiple races .
Most of the engines , including those used for the Indy 500 , are were intended to last 1,200 miles ( 1,931 kilometers ) between rebuilds .
Most of the engines , including those used for the Indy 500 , are used for multiple races and were intended to last 1,200 miles ( 1,931 kilometers ) between rebuilds .