Dale Earnhardt Jr. has never won at Martinsville, but he has finished in the top five in seven of his past 12 races here.
He said he really struggled at the track until he came for two days of testing.
“When you first come here you’re thinking, ‘Oh, I’m doing it wrong, I’ve got to go harder and do this different and harder, harder, harder,’” Earnhardt Jr. said.
“And you just make it worse, worse and worse.
"Once you figure out how to get the car to turn and work and be able to put the power down, it makes learning how to drive this track way easier.”