NASCAR O'Reilly Auto Parts Series 2026

NASCAR's second national division got going in 1982 and has spent forty-five years doing two things at once: manufacturing drivers for the Cup and providing a stage for those already up there who drop down a rung for an easy win that almost never is.

Its history is told through sponsors, because the category has never had a name of its own. It started under the Anheuser-Busch umbrella, spent seven years as Nationwide and eleven seasons carrying the name of Xfinity, Comcast's cable brand. From this year it is named by O'Reilly Auto Parts, the fourth title on the list, on a multi-year deal.

The beauty of the format is that neither vocation cancels the other. A seventeen-year-old can share a corner with a Cup champion, and neither has anything to lose by trying. Out of that comes a competition where experience and the lack of it collide every weekend, and where the list of winners rarely resembles last year's.

Connor Zilisch won ten of the thirty-three races in 2025, took the regular-season championship and became the third driver in the category's history to string together four straight wins. He finished the year without the title.

It went to Jesse Love, who won the final race at Phoenix on 1 November and with it the championship. Zilisch came second. Austin Hill, with four wins, was the third man in the argument. And one line was repeated all winter: under any of the previous points systems, Zilisch would have been champion by an enormous margin.

That is the kind of ending that forces a look at the rulebook. A play-off format designed so the last race decides had produced its most extreme version: the driver who won one race in three came away with nothing, and the champion was champion because of a single Sunday. NASCAR's answer did not take long, and it is what changes this year.

NASCAR has dismantled the system that produced that outcome. For 2026 the top twelve in the standings after the first twenty-four races enter the final phase, and the win-and-you're-in rule that let anyone with a single victory into the play-off is scrapped. What is more, the points you start that phase with are staggered according to the regular standings: whoever dominated the year arrives with a lead on the board rather than a reset to zero. In practice it is a return to the classic Chase of 2004 to 2013.

The other change concerns who gets in the car. The cap on races a Cup driver may contest here rises from five to ten, meaning the top tier can drop down twice as often. And the minimum age falls to seventeen for road courses and ovals under two kilometres.

One small detail with consequences is added: anyone entering the garage forfeits the fastest-lap bonus points. Less incentive to go back out purely to chase a single lap in a broken car.

Thirty-three races between 14 February and 7 November, on almost every consecutive weekend, and a mix of surfaces no other championship has: superspeedways like Daytona and Talladega, short ovals like Martinsville and Bristol, intermediate ovals, road courses and the odd street circuit.

The big change is at the end. The finale leaves Phoenix, which had hosted it since 2020, and returns to Homestead-Miami, where a championship in this category had not been settled since 2019. And it is not a permanent move: from now on the venue of the last race will rotate between circuits.

The rest of the map moves too. The Coronado street course in San Diego makes its debut. Chicagoland returns, absent since 2019, and Darlington's second date is restored. Charlotte's autumn race leaves the road layout and is run on the oval. And three drop out: Portland, the Chicago street course and the Hermanos Rodríguez in Mexico City.

Three manufacturers share the grid — Chevrolet, Ford and Toyota — and the split is neither balanced nor meant to be: Chevrolet puts out considerably more cars than the other two combined, so in any given weekend's manufacturer points count it almost always comes out on top even when somebody else wins the race. It is a faithful picture of how the business is organised: the big teams pick a marque and the small ones follow.

The field runs to around thirty-eight cars and reads in two layers. Below, twenty-year-olds on development contracts and teams that live off finishing. Above, the mixture that gives the category its character: Cup champions and race winners who show up a handful of times a year — now up to ten — with top-level equipment and nothing at stake but winning.

That asymmetry is the series' trap. A weekend with three or four Cup drivers entered does not read like one without them: the favourite may not be fighting for the championship, and the driver who is can post an excellent third place that counts for more in the table than the visitor's win.