With the Milwaukee Mile, Sonoma Raceway and Auto Club Speedway left on the 2014 IndyCar schedule, Power holds only a four-point lead over Helio Castroneves, his teammate at Team Penske.
The series will run at Milwaukee on Sunday and then head to Sonoma in Northern California (Aug. 24) before the season concludes at ACS in Southern California (Aug. 30). ACS is the final leg in IndyCar's "Triple Crown" and awards double points.
Power held the top spot in the IndyCar standings with three races remaining in 2010 and '12, but finished runner-up in the championship in both years. He was five points behind champion Dario Franchitti in 2010 and three points in back of titleholder Ryan Hunter-Reay in '12.
"I'm not considering the amount of points that are on the table," Power said. "Maybe those four points will count in the end, but it's a full season of racing and points. And the guy that scores the most at the end just kind of ebbs and flows as far as who is leading at the time. But in particular, it's definitely a pretty tight year with three races to go, or really four races worth of points to go. So in a funny way, it's still kind of early considering how many points are on the table."
The most recent race in the series took place on Aug. 3 at Mid-Ohio Sports Car Course. Castroneves came to Mid-Ohio atop the rankings, but Power's sixth- place finish compared to a 19th-place run for Castroneves there allowed Power to move back into the points lead.
Power has 23 career wins in IndyCar competition, but only two of those victories have occurred on ovals -- Texas (race 2) in 2011 and last year's season-finale at ACS.
He has raced at Milwaukee, a flat one-mile oval, five times. His best finish here is third, which came one year ago.
"It's the only flat oval that we race with pretty much no banking," he said. "It creates a situation where the car set-ups really matter. So you see a lot of people strong at the beginning and seeing them struggle at the end and vice versa, which creates good racing in the end. Then sometimes you're off- strategy and you're on new tires and people aren't, so it makes it a fun race from that point of view.
"It's just another unique part of the IndyCar Series where you're racing on something different from everything else in the series. I enjoy it."
Castroneves is a three-time Indianapolis 500 winner but has yet to win an IndyCar championship.
"We're right there, but we still have three very intense races left," Castroneves said. "These next three tracks are very demanding, so we have to continue to stay on top of our game. We know Will is going to be tough."
Castroneves has competed at Milwaukee 13 times. His best finish here is second, which occurred in 1998 (CART race) and 2013.
Hunter-Reay from Andretti Autosport has won the last two races at Milwaukee. He is currently 63 points behind Power. Two of Hunter-Reay's three wins this season have happened on ovals -- Indianapolis and Iowa.
Twenty-two teams are on the entry list for the ABC Supply Wisconsin 250.
Series: Verizon IndyCar. Date: Sunday, Aug. 17. Race: ABC Supply Wisconsin 250. Site: The Milwaukee Mile. Track: 1-mile oval. Start Time: 3:50 p.m. ET. Laps: 250. Miles: 250. 2013 Winner: Ryan Hunter-Reay. Television: NBC Sports Network. Radio: IMS Radio Network/SIRIUS XM Satellite.