On the final pitstop, teammate Sadler got two tires and managed to hold off a charging Brad Keselowski for his first Nationwide win in 14 years.
Heading to Las Vegas, defending champion Ricky Stenhouse Jr. held off veteran Mark Martin for his first win of the season.
But Elliott Sadler, on the advice of crew chief Luke Lambert, stayed out during the final round of pit stops and held off Kasey Kahne for his second win in four races.
At Charlotte, Keselowski stayed out during the final round of pit stops, going 73 laps on a single tank of fuel to claim his first win of the season.
At Kentucky, Austin Dillon dominated the race, easily holding off the field to take his first career Nationwide win and becoming the first rookie winner since Juan Pablo Montoya.
The series made its inaugural trip to the Brickyard, where points leader Sadler led after Kyle Busch was involved in a late wreck.
Cup regular Keselowski took the lead and held off teammate Sam Hornish Jr. to give owner Roger Penske his first stock car win at Indy.
At the second race in Iowa, polesitter Elliott Sadler rebounded from the disappointment at Indy and held off Justin Allgaier to grab his fourth win of the season.
Returning to Chicagoland, Stenhouse rallied from an incorrect adjustment on the final pit stop to pass Kyle Busch with 20 to go to take his fifth win of the season as well as the points lead.
The series returned to Dover, where Logano once again dominated the race, leading 184 of 200 laps en route to his 7th win of the year and the season sweep at the "Monster Mile".
The final 30 laps were a fuel mileage race, where Logano, who pitted with 14 to go, retook the lead with 6 to go, rolling to his series high 8th win of the season.
At a repaved Kansas, Stenhouse rallied from 2 laps down as well as mid-race contact with Logano to beat Kyle Busch on a green-white-checkered restart to grab his sixth win of the year.