In 1985, Frentzen moved into car racing by entering the German Formula Ford 2000 series. After two seasons in Formula Ford he was runner-up in the 1987 series, despite not participating in all races. Frentzen progressed to German Formula Opel Lotus in 1988 in the Junior Team of former Formula One driver Jochen Mass, who had been impressed by Frentzen's performances in Formula Ford. Frentzen was champion of the German series in his first year and his teammate Marco Werner finished third in the championship. He also participated in the Formula Opel Lotus Euroseries, where he finished 6th in the championship, scoring 56 points.