Their first national title came after six years, as Juventus were champions in the 1929-30 season. After the reorganisation of the Romanian football's division structure, Juventus played 7 consecutive seasons in Liga I, from 1933 to 1940. Following World War II, the club was promoted once again to Liga I, having finished in 1st place in the final Liga II season prior to the outbreak of war. From 1946-1952 Juventus had 6 consecutive seasons in Liga I; they also changed their name numerous times, being known as Distribuția, Competrol, Petrolul, Partizanul and Flacăra. In 1952 the team moved to Ploiești, and changed its name to Flacăra Ploiești accordingly.
Petrolul's traditional, historic rival is Rapid Bucharest. Petrolul and Rapid fans have maintained a strong rivalry, despite long periods of not meeting when one or the other were playing in the second division.
Petrolul maintains a strong rivalry with Astra Giurgiu, its former local enemy. The rivalry started when Astra promoted for the first time in the Divizia A in 1998, as their fans engaged in a grudge with Petrolul. Astra played in Ploiești until September 2012, when it was moved to Giurgiu by its owner. Even after the move, the rivalry continues.