DCR for the 2013 season after signing a long-term contract; he changed his car number to 19. He began the year with three consecutive top-nine finishes. Wilson qualified for the Indianapolis 500 in 14th and finished a career-high fifth. His performance for the rest of 2013 included three podium finishes—two third places at the first Detroit Belle Isle Grand Prix and the Grand Prix of Houston, and a season-high second at the Indy Grand Prix of Sonoma. At the season-ending IndyCar World Championships at the Auto Club Speedway, Wilson was involved in a high speed lateral impact with driver Tristan Vautier, sustaining a minor pulmonary contusion and three non-operable breakages to his pelvis. He was told to avoid bearing weight on his right leg before commencing rehabilitation. Wilson finished the season a series-high sixth in the drivers' standings with 472 points. DCR owner Dale Coyne took up an option to retain Wilson for the 2014 season after recovering from injury and recommenced training. Michael Cannon became his race engineer after Bill Pappas moved to Rahal Letterman Lanigan Racing. Coyne promised Wilson better resources for him to continue achieving top-ten finishes. His first top ten-finish of 2014 was a sixth at the Indy Grand Prix of Alabama. Wilson started 14th at the Indianapolis 500 finishing eight places lower and two laps down in 22nd after debris damaged his front wing late in the race. One race later, Wilson achieved a season-best fourth at the Detroit Belle Isle Grand Prix and four top-ten finishes in the final 12 rounds for 15th overall with 395 points. He left DCR after the season ended because of their limited budget for a full-time campaign, and sought employment with another team for the 2015 season, saying: "It's one of those things, where I could find out tomorrow, or it could be in another month or two months." Talks with Andretti Autosport owner Michael Andretti, who was interested in Wilson, about a full-time campaign ended in March 2015 over sponsorship issues. That same month, Wilson signed a two-race contract to drive Andretti Autosport's No. 25 car in May's Grand Prix of Indianapolis and the Indianapolis 500. He started his final Indianapolis 500 from sixth position. During the race a tyre vibration and a pit stop strategy error left him in 21st. Afterwards, Wilson obtained sponsorship to drive the season's final five races for Andretti, finishing a year-high