2018 NASCAR Xfinity Series


The 2018 NASCAR Xfinity Series was the 37th season of the NASCAR Xfinity Series, a stock car racing series sanctioned by NASCAR in the United States. William Byron won the 2017 championship with JR Motorsports, but moved up to the Monster Energy NASCAR Cup Series. Tyler Reddick, who replaced Byron in the No. 9 JR Motorsports Chevrolet Camaro SS, won the drivers' championship. Stewart-Haas Racing with Biagi-DenBeste won the owners' championship.
This was the third year that the Xfinity Series had a playoff system. For the first time in the three years of the playoffs at that time, Elliott Sadler and Justin Allgaier were not part of the "championship 4" drivers competing for the title at Homestead. Both drivers did qualify for the postseason but did not advance to the last round of the playoffs as they had done the past two years.
The 2018 season was the first to feature the Regular Season Championship trophy, which is awarded at the final race before the playoffs. Justin Allgaier clinched the NXS Regular Season Championship trophy after the 2018 DC Solar 300 at Las Vegas Motor Speedway.
This was the final season of the Toyota Camry in the Xfinity Series, as it was replaced by the Supra in the 2019 season. It was also the final season of Dodge as a manufacturer, as the new flange-fit composite body rules have made the former Team Penske Challengers used by smaller teams ineligible due to their welded steel bodies.

Teams and drivers

Complete schedule

Limited schedule

;Notes:

Changes

Teams

The final schedule – comprising 33 races – was released on May 23, 2017. Key changes from 2017 include:
In 2015, NASCAR and 24 Xfinity Series tracks agreed on a five-year contract that guarantees each track would continue to host races through 2020. Despite the agreement, Speedway Motorsports decided to transfer one of its Xfinity Series races at Kentucky Speedway to Las Vegas Motor Speedway to form a race weekend involving each of the three national series in the fall. With the official release of the schedule, NASCAR announced that the race Las Vegas Motor Speedway acquired from Kentucky Speedway will become the final race before the Xfinity Series playoffs, while the Go Bowling 250 at Richmond Raceway will be held as the first race of the playoffs. Furthermore, the Lilly Diabetes 250 at Indianapolis Motor Speedway will move from July to September. Chicagoland Speedway's race, the Overton's 300, will move from September to June to become the 15th race of the season instead of the 26th.
A few other minor schedule changes were also announced with the release of the schedule. Unlike the 2017 season, the OneMain Financial 200 at Dover International Speedway will precede the Alsco 300 at Charlotte Motor Speedway, while the Bar Harbor 200, also at Dover International Speedway, will move one week later to follow the Drive for the Cure 200 at Charlotte Motor Speedway. The Drive for the Cure 200 will also utilize Charlotte Motor Speedway's road course instead of its oval. Road America will also move back to a Saturday afternoon.
On August 25, NASCAR announced the tracks that will compose the Dash 4 Cash incentive program: The four Dash 4 Cash races will be run consecutively on the overall series schedule, starting at Bristol Motor Speedway on April 14. From there, the bonus program rolls on to Richmond Raceway and Talladega before concluding at Dover International Speedway on May 5. Drivers eligible for driver championship points in the Monster Energy NASCAR Cup Series are ineligible to participate in either Dash 4 Cash, the second Las Vegas race, or the playoff races. Drivers such as Elliott Sadler and Dale Earnhardt Jr., who are expected to register as Xfinity drivers, will be eligible since they are registering as Xfinity drivers.

Results and standings

Race results

Drivers' Championship

Bold – Pole position awarded by time. Italics – Pole position set by final practice results or owner's points. * – Most laps led. 1 – Stage 1 winner. 2 – Stage 2 winner. 1–10 – Regular season top 10 finishers.

. – Eliminated after Round of 12
. – Eliminated after Round of 8

Owners' championship (Top 15)

Bold - Pole position awarded by time. Italics - Pole position set by final practice results or rainout. * – Most laps led. 1 – Stage 1 winner. 2 – Stage 2 winner. 1–10 – Owners' regular season top 10 finishers.

. – Eliminated after Round of 12
. – Eliminated after Round of 8

Manufacturers' Championship