Elliott Sadler won the first $100,000 award with his third-place run at Daytona earlier this month. Since then, it has been all Dillon, who is the only driver to qualify for all four bonus events. He finished third at both New Hampshire and Chicagoland.
Sam Hornish Jr., Brian Vickers and Sadler are eligible for the bonus at Indy as well.
Dillon finished fifth in last year's race at Indianapolis.
"It was very special to run the first NASCAR Nationwide Series race at Indianapolis Motor Speedway, because every time you can be in an inaugural race, it is history being made. As a driver, you love getting those little notches on your belt. Going back for the second time, you have a lot more experience, so you know what to expect with the track."
Dillon also is entered in the Brickyard 400 this weekend, driving the No. 33 Chevrolet for Richard Childress Racing. He competed in the Daytona 500 for the first time earlier this year.
"There is so much history at Indy, and I love going there," he said. "I've been able to go to the Brickyard 400 for a long time with my family. Last year, running the inaugural NASCAR Nationwide Series race with my brother (Ty Dillon) was really, really special. That's just history right there. To make my first Daytona 500 start and my first Brickyard 400 start in the same year is pretty cool."
After scoring three consecutive top-five finishes, Dillon has moved up to third in the point standings. He is just eight points behind leader Hornish and only one marker in back of Regan Smith. Dillon has yet to win a Nationwide race this season.
Forty-two teams are on the preliminary entry list for the Indiana 250.
Series: NASCAR Nationwide. Date: Saturday, July 27. Race: Indiana 250. Site: Indianapolis Motor Speedway. Track: 2.5-mile oval. Start time: 4:30 p.m. ET. Laps: 100. Miles: 250. 2012 Winner: Brad Keselowski. Television: ESPN. Radio: IMS Radio Network/SIRIUS NASCAR Radio.