HOMESTEAD, Fla. — Despite the most dramatic finish in Chase history, NASCAR officials are looking to tweak the formula when rolling out the rules of engagement next season.

It’s an intriguing call by the leaders of a sport that has suffered a decline in fan interest. There had been a dip in attendance in 26 of the 35 races leading up to the big finish in Homestead, where Jimmie Johnson came from behind to take his fifth consecutive title.

The possible tweaks include expanding the field from 12 to 15 drivers and adding “knockout” rounds that would eliminate drivers as the schedule progresses.

“... The idea is to create big moments by the best teams at the end of the year that have to put their best performances forward to win it all,” NASCAR chairman Brian France said over the weekend. “If there’s a better way to do that, I’m sure we’ll consider it.”

One concession might be to decrease the length of races. There were a dozen 500-mile races on this year’s schedule. One of Auto Club Speedway’s two races was shortened to 400 miles this year and was met with favorable results.

“At the end of the day, whatever we need to do to have butts in the stands and people watching on TV,” Johnson said.