How a bitter 1994 schism nearly destroyed the pinnacle of American open-wheel racing.
In short: The IndyCar Series was born from a civil war in motorsport. When a 1994 feud split the sport, the resulting fragmentation caused a dramatic decline in popularity. It took decades of reorganization, a 2008 merger, and new leadership to finally steer the series back toward growth and relevance.
The modern IndyCar Series traces its roots to 1996, when Indianapolis Motor Speedway owner Tony George launched the Indy Racing League (IRL). This move was a direct challenge to the established Championship Auto Racing Teams (CART), sparking an acrimonious schism often called 'The Split.' For years, this rivalry divided the sport's resources, fan base, and talent, inflicting enormous damage on the popularity of American open-wheel racing.
The feud finally ended in 2008 with a merger that unified the series under the IndyCar banner. However, the recovery was slow. It was not until the 2020 purchase and reorganization by Roger Penske, combined with a 2025 broadcast partnership with Fox Sports, that the series began to see a genuine resurgence in viewership and interest. Today, the series operates as a self-sanctioned entity under IndyCar, LLC.
Technically, the series has evolved from an era of diverse chassis manufacturers to a standardized model. While teams once used various designs, the series now mandates a single-make chassis from Dallara to control costs. This shift included the 2012 adoption of the DW12 chassis—named for Dan Wheldon—and the 2020 introduction of the 'aeroscreen' cockpit protection system, which combines Formula One's Halo concept with a reinforced windscreen to improve driver safety.
Innovation also extends to the fuel tank. In a notable shift from the methanol used since 1964, the series transitioned to ethanol in 2007. This move, initially promoted by the Ethanol Promotion and Information Council, replaced caustic methanol with a renewable fuel that is less irritating to the skin and carries a distinct, sweet scent often compared to apple cider.
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- Summary by Intellect · source: IndyCar Series
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