A full-time return to sportscar racing was possible in 1990, when he was offered a ride by Jim Busby, who had entered a Nissan GTP ZX-Turbo. In only his second race for the team, Paul and Kevin Cogan were on the podium after taking second place in the Grand Prix of Miami. Following a fifth place in Sebring, the Nissan was maintained by Seabrooke Racing. He ended the season with two second places in the World Challenge of Tampa and Grand Prix of Greater San Diego (Del Mar). His reward was 8th in the overall standings, but as he found, a lot of things had changed in these four seasons he missed. Full factory supported teams like Tom Walkinshaw Racing (Jaguar), Electramotive (Nissan) and All American Racers (Toyota) were now the ones to beat.