The Complete 2026 NASCAR O’Reilly Auto Parts Series on the CW TV Ratings Tracker

What’s Happening?

NASCAR’s secondary series is facing a huge brand change, leaving the title name “Xfinity Series” to become the brand-new O’Reilly Auto Parts Series. What is not changing, however, is its broadcast partner. The CW is headed for its 2nd season with the series and has been investing heavily in it. Year after year, we put up the rating numbers and rank them accordingly in comparison to the previous season. Here’s how it works:

• We will directly compare each race’s viewership from 2025 to that race’s (or closest comparable race’s) 2026 viewership. We will also keep a tally of how each race weekend fared compared to the same weekend last season.
• This can be confusing, as the “2026 Season as a Whole” section compares races not directly to themselves, but to their corresponding 2025 race weekends. For example, in that section, the 3rd race of the year is compared to 2025’s 3rd race of the season, regardless of the race track.
• If necessary, we will also address any potential dips in ratings, such as weather delays, postponements, or debuting races, like San Diego taking over for the Mexico City race.

The 2026 O’Reilly Auto Parts Series Season as a Whole

All Races (3 Total in 2026): Includes data from all races. If data is missing, we will note which race it is from.

• 2026 Total/Average Viewership to Date: (Available Data From 1 Race): 4.250 Million/1.417 Million Per Race
• 2025 Total/Average Viewership to Date (Available Data From 32 Races): 4.251 Million/1.417 Million Per Race
• Total Viewership Difference (2026 vs 2025): -0.001 Million (-0.024%)
• Average Viewership Difference (2026 vs 2025): +/-0.000 Million (-0.024%)

Focused Health 250 at Circuit of the Americas via Austin Konenski

Full weekend including IndyCar.

– Cup (COTA): 3.933 million viewers
– IndyCar (St. Petersburg): 1.335 million viewers
– O’Reilly (COTA): 1.072 million viewers
– Truck (St. Petersburg): 1.039 million viewers

— Austin Konenski (@AustinKonenski) March 3, 2026

• 2026 Viewership: 1.072 Million Viewers
• 2025 Viewership: 1.120 Million Viewers
• Viewership Comparison (2024 vs 2025): -0.048 Million (-4.286%)

Bennett Transportation & Logistics 250 at EchoPark Speedway

📈 pic.twitter.com/UsXeU6a9eU

— The CW Sports (@TheCW_Sports) February 25, 2026

• 2026 Viewership: 1.366 Million Viewers
• 2025 Viewership: 1.306 Million Viewers
• Viewership Comparison (2024 vs 2025): +0.060 Million (+4.594%)

United Rentals 300 at Daytona via Adam Stern

.@TheCW got 1.812 million viewers for Saturday's NASCAR O'Reilly Auto Parts Series race at Daytona, flat from last year, per Nielsen's panel and big data figures.

➡️ The race drew 340,000 viewers in the adults 18-49 demographic, the best for an event in that series since 2018. pic.twitter.com/JbyV4L0s0I

— Adam Stern (@A_S12) February 18, 2026

• 2026 Viewership: 1.812 Million Viewers
• 2025 Viewership: 1.825 Million Viewers
• Viewership Comparison (2024 vs 2025): –0.013 Million (-0.717%)

This tracker will be updated throughout the season. Make sure to check back in for the latest!