sentences:  For the remainder of the race, Bobby Unser and Rick Mears traded the lead, While leading on lap 164, Rick Mears killed the engine on his pit stop, causing him to lose 12 seconds to Bobby Unser.This allowed Unser to lead most of the remaining laps, and won over Rick Mears.Mario Andretti claimed third despite running out of gas at the end, Johnny Rutherford finished fourth, and Al Unser ended up in fifth.