The 2016 TreatMyClot.com 300 by Janessen was the fifth stock car race of the 2016 NASCAR Xfinity Series season and the 18th iteration of the event.
The race was held on Saturday, March 19, 2016, in Fontana, California, at Auto Club Speedway, a 2 miles (3.2 km) permanent D-shaped oval racetrack.
In a wild finish, Austin Dillon, driving for Richard Childress Racing, would take advantage of both Daniel Suárez, who ran out of fuel on the final lap, and eventual second-place finisher Kyle Busch, who suffered a flat tire on the final lap.
[2] Kyle Busch of Joe Gibbs Racing would set the fastest time in the session, with a lap of 40.603 and an average speed of 177.327 miles per hour (285.380 km/h).
[2] Austin Dillon of Richard Childress Racing would set the fastest time in the session, with a lap of 40.765 and an average speed of 176.622 miles per hour (284.246 km/h).