Formula Two had grown prohibitively expensive and was increasingly dominated by factory-backed teams with works engines, undermining its value as an accessible development series. The FIA's solution was a category using 3,000 cc engines — hence the name — which allowed the repurposing of relatively affordable, abundant hardware. The Cosworth DFV, made obsolete in Formula One by the turbo era's adoption of 1.5-litre engines, was immediately available and popular. A Honda engine derived from an Indy V8, developed by John Judd, also appeared. The series began as an open specification in 1985, with tyre standardisation following in 1986 and full engine and chassis standardisation introduced in 1996.
The championship was staged as the Formula 3000 European Championship in 1985, the Formula 3000 Intercontinental Championship in 1986 and 1987, and the Formula 3000 International Championship from 1988 to 2004.
The early open-chassis era saw designs from March, Automobiles Gonfaronnaises Sportives, Ralt, and Lola, alongside a handful of adapted Formula One cars from Tyrrell, Williams, Minardi, Arrows, and RAM — the latter proving too heavy and unwieldy due to oversized fuel tanks. March established early supremacy, before Reynard's entry in 1988 — the marque had won its first race in every formula it previously entered, and did so again in F3000. Reynard ultimately achieved near-monopoly status by the mid-1990s.
In the engine department, the Cosworth DFV gave way to the Mugen-Honda V8 as the preferred unit, with Cosworth eventually responding with the new AC engine. Costs climbed significantly as competition for performance intensified.
In 1996, the series moved to a full spec format: a single Lola chassis, a detuned Judd V8 re-engineered and badged as a Zytek producing 450–520 hp, and Avon control tyres. Final-specification cars used a 3.0-litre DOHC V8, six-speed paddle-shift sequential gearbox, and weighed 545 kg including the driver.
Formula 3000 races in the open-chassis era were held at major circuits across Europe, typically covering 100–120 miles. The series visited France, Italy, Spain, Germany, and the United Kingdom. The Pau Grand Prix street race was considered the jewel in the crown of the season, with the Birmingham round providing competition for prestige during its years on the calendar. From 1997, after the introduction of spec machinery, the calendar was combined with Formula One, making F3000 a Grand Prix support series. This dramatically increased the series' profile, and entry lists swelled to nearly forty cars, though this in turn created problems as many drivers failed to qualify.
The championship saw recurring difficulties. Rules for the 1985 inaugural season did not appear in final form until the season was already underway. In 1987 the high accident rate drew questions about driver quality. In 1989 the eligibility of the new Reynard chassis was challenged after it raced with a different nose to the one that had been crash-tested. Driver changes mid-season became a persistent issue as costs escalated — at one point a rule limiting changes to two per car per season left some cars idle while drivers with funding could not find seats. In 1991, some Italian teams exploited what was termed "jungle juice" Formula One-specification fuel, estimated to be worth around 15 bhp, prompting a significant competitive controversy. The only fatality in the International Championship was Marco Campos, killed during the final round of the 1995 season.
By 2002, despite the cleaner competition environment provided by spec machinery, costs had risen sharply again and entries dwindled. Cheaper alternatives — European F3000, World Series by Nissan, and Formula Renault V6 Eurocup — competed directly for the pool of funded drivers. Car counts fell to new lows. The 2004 season was the last, and in 2005 Formula 3000 was replaced by GP2, a new series backed by Renault.
Formula 3000 champions who reached Formula One included Jean Alesi, Olivier Panis, and Juan Pablo Montoya — the three who won Formula One Grands Prix. Montoya also won the Indianapolis 500. Other champions pursued careers in North American open-wheel racing: Bruno Junqueira and Justin Wilson in CART and Champ Car, Roberto Moreno in IndyCar. Olivier Müller and Björn Wirdheim, who both took championships, never started a Formula One race. Emanuele Sospiri attempted to qualify with the disastrous 1997 MasterCard Lola team but failed.
Several Grand Prix teams established junior relationships with F3000 teams through the late 1990s to develop drivers and engineers — McLaren's programme around Nick Heidfeld being among the most visible examples.
International Formula 3000 defined the junior open-wheel pathway for two decades and shaped the careers of a generation of drivers who would go on to define Formula One in the 1990s and 2000s. Its transition from a relatively open, cost-effective concept to an increasingly expensive spec series mirrors a recurring tension in junior formula organisation, and the lessons of its decline directly informed the design philosophy of its successor, GP2.