2018 O'Reilly Auto Parts 300

The 2018 O'Reilly Auto Parts Challenge was the 31st stock car race of the 2018 NASCAR Xfinity Series season, the second race in the Round of 12, and the 18th iteration of the event. The race was held on Saturday, November 3, 2018, in Fort Worth, Texas at Texas Motor Speedway, a 1.5 miles (2.4 km) permanent tri-oval shaped racetrack. The race took the scheduled 200 laps to complete. A wild finish would see Cole Custer of Stewart-Haas Racing with Biagi-DenBeste best JR Motorsports driver Tyler Reddick with a last-lap pass on the backstretch to win his second career NASCAR Xfinity Series race, his first and only win of the season, and a guaranteed spot in the Championship 4. To fill out the podium, Austin Cindric of Team Penske would finish third.

Background
Texas Motor Speedway is a speedway located in the northernmost portion of the U.S. city of Fort Worth, Texas – the portion located in Denton County, Texas. The track measures 1.5 miles (2.4 km) around and is banked 24 degrees in the turns, and is of the oval design, where the front straightaway juts outward slightly. The track layout is similar to Atlanta Motor Speedway and Charlotte Motor Speedway (formerly Lowe's Motor Speedway). The track is owned by Speedway Motorsports, Inc., the same company that owns Atlanta and Charlotte Motor Speedway, as well as the short-track Bristol Motor Speedway.

Entry list
* Bilicki would wreck during pre-race activities, and as JP Motorsports had no backup cars, they would withdraw the #55 entry, and move Currey to the #45 entry.

First practice
The first practice session was held on Friday, November 2, at 2:05 PM CST, and would last for 45 minutes. Ryan Truex of Kaulig Racing would set the fastest time in the session, with a lap of 28.852 and an average speed of 187.162 mph.

Second and final practice
The second and final practice session, sometimes referred to as Happy Hour, was held on Friday, November 2, at 4:35 PM CST, and would last for 50 minutes. Ryan Truex of Kaulig Racing would set the fastest time in the session, with a lap of 28.757 and an average speed of 187.780 mph.

Qualifying
Qualifying was held on Saturday, November 3, at 12:40 PM CST. Since Texas Motor Speedway is under 2 miles (3.2 km), the qualifying system was a multi-car system that included three rounds. The first round was 15 minutes, where every driver would be able to set a lap within the 15 minutes. Then, the second round would consist of the fastest 24 cars in Round 1, and drivers would have 10 minutes to set a lap. Round 3 consisted of the fastest 12 drivers from Round 2, and the drivers would have 5 minutes to set a time. Whoever was fastest in Round 3 would win the pole.

Christopher Bell of Joe Gibbs Racing would win the pole after advancing from both preliminary rounds and setting the fastest lap in Round 3, with a time of 28.523 and an average speed of 189.321 mph.

No drivers would fail to qualify.

Race results
Stage 1 Laps: 45 Stage 2 Laps: 45 Stage 3 Laps: 110