Michigan 500: Al Unser, Penske PC-16 Chevrolet, leads Rick Mears, Penske Racing, March 87C Chevrolet, Danny Sullivan, Penske Racing, March 87C Chevrolet, Roberto Gurrero, Granatelli Racing, March 87C Cosworth, Bobby Rahal, TrueSports, Lola T87/00 Cosworth, and Al Unser Jr, Doug Shierson Racing, March 87C Cosworth.
Al Unser, Penske PC-16 Chevrolet, leads Rick Mears, Penske Racing, March 87C Chevrolet, Danny Sullivan, Penske Racing, March 87C Chevrolet, Roberto Gurrero, Granatelli Racing, March 87C Cosworth, Bobby Rahal, TrueSports, Lola T87/00 Cosworth, and Al Unser Jr, Doug Shierson Racing, March 87C Cosworth.