Team owner Roger Penske's NASCAR XFINITY Series operation last won the driver's championship in 2010 with Brad Keselowski, but the organization's No. 22 team has gone undefeated for three consecutive years when it comes to the owner's title.
Ryan Blaney, Sprint Cup Series drivers Keselowski and Joey Logano and road racer Alex Tagliani each piloted the No. 22 Ford this season, collecting seven of the organization's eight wins in the series.
"I think it's an investment," Penske said of the XFINITY Series program. "It's an investment on pit road for building guys over the wall, point number one, and point number two, to take a young driver like Blaney and get him in a car.
"The top driver is just not available when you need him, so you've got to build him. You've seen what (Jeff) Gordon and (Jimmie) Johnson and all the great drivers (have done)."
The No. 22 team ended the season with 1,308 points, 117 ahead of Joe Gibbs Racing's No. 54 Toyota entry and 118 ahead of the No. 60 Ford of Roush Fenway Racing.
Roush Fenway Racing driver Chris Buescher clinched the 2015 driver's title.
JGR finished second to Penske in '13-14 in the battle for the owner's title as well.
Blaney has split his time between the XFINITY Series and the NASCAR Sprint Cup Series this season, competing in Sprint Cup with Wood Brothers Racing. The No. 21 team will run the full 36-race schedule next season. Team Penske and the Wood Brothers outfit have a technical alliance.
"From the standpoint of sponsorship, Discount Tire has been with us almost from the beginning," Penske said. "They like the XFINITY Series. They think it gives them exactly what they want. To me we've got a good sponsor.
"We only run one car, occasionally we run two maybe at Watkins Glen, but to me I think it's an important part of our organization. Running two Cup cars and having the ability to work with the (Wood Brothers) I think helps us build that team, and we can move people back and forth, and then of course with the XFINITY, it's really the early stages of young guys that are coming into the sport and people that can make a difference.
"You know, there's just no question that the people have moved up (to Sprint Cup). Everybody that's at the top level today in our Cup cars have won and worked in the XFINITY Series, so I think that that's amazing when you think about it."