William Byron nursed his car to the finish line at Iowa Speedway as the whole team held its breath there was enough fuel to take the checkered flag.

Byron made his final pit stop on Lap 206 of 350 on the 0.875-mile oval, where the pit window is estimated at about 110 green-flag laps. The Hendrick Motorsports driver led a race-high 141 laps in his first victory since winnig the Daytona 500 season opener.