1978 USAC Championship Car season

Rick Ravon Mears is a retired American race car driver. He is one of four men to win the Indianapolis 500 four times and is the current record-holder for pole positions in the race with six. Mears is also a three-time Indycar series/World Series champion.

Alfred Unser was an American automobile racing driver, the younger brother of fellow racing drivers Jerry and Bobby Unser, and father of Al Unser Jr. He was the second of four men to have won the Indianapolis 500 four times, the fourth of five to have won the race in consecutive years, and the winner of the National Championship in 1970, 1983, and 1985. The Unser family has won the Indy 500 a record nine times. He was the only person to have both a sibling (Bobby) and child as fellow Indy 500 winners. Al's nephews Johnny and Robby Unser have also competed in that race. In 1971, he became the only driver to date to win the race on his birthday.

Robert William Unser was an American automobile racer. At his induction into the Motorsports Hall of Fame of America in 1994, he had the fourth most IndyCar Series wins at 35. Unser won the 1968 and 1974 United States Automobile Club (USAC) national championships. He won the Pikes Peak International Hill Climb overall title 10 times.

Team Penske is an American professional auto racing organization, competing in the IndyCar Series, NASCAR Cup Series, IMSA SportsCar Championship and FIA World Endurance Championship. Debuting at the 1966 24 Hours of Daytona, the organization has also competed in various other types of professional racing such as Formula One, Can-Am, Trans Am, and Australia's Supercars Championship. Altogether, Team Penske has earned over 500 victories and over 40 championships in all of auto racing. Team Penske is a division of Penske Corporation, and is owned and chaired by Roger Penske. The team president is Tim Cindric.

The 63rd 500 Mile International Sweepstakes was held at the Indianapolis Motor Speedway in Speedway, Indiana, on Sunday May 27, 1979. Second-year driver Rick Mears took the lead for the final time with 18 laps to go, and won his first of four Indianapolis 500 races. It was also Mears' first of a record six Indy 500 pole positions. Brothers Al and Bobby Unser combined to lead 174 of the 200 laps, but Al dropped out around the midpoint, and Bobby slipped to 5th place at the finish nursing mechanical issues. It was also Roger Penske's second Indy 500 victory as a car owner.

The 64th 500 Mile International Sweepstakes was held at the Indianapolis Motor Speedway in Speedway, Indiana on Sunday, May 25, 1980. Johnny Rutherford won the pole position, led 118 laps, and won the race by a commanding 29.92 second margin. After failing to finish the race the year before, Jim Hall's radical new Chaparral 2K ground effects chassis was a heavy favorite entering the month, and drove a flawless race. Rutherford, the winner in 1974 and 1976, became the sixth driver to win the Indy 500 three times.

The 65th Indianapolis 500 was held at the Indianapolis Motor Speedway in Speedway, Indiana on Sunday, May 24, 1981. The race is widely considered one of the most controversial races in Indy history. Bobby Unser took the checkered flag as the winner, with Mario Andretti finishing second. After the conclusion of the race, USAC officials ruled that Unser had passed cars illegally while exiting the pit area during a caution on lap 149. Unser was subsequently issued a one-position penalty. The next morning, the official race results were posted, and Unser was dropped to second place. Mario Andretti was elevated to first place and declared the race winner.

The 68th Indianapolis 500 was held at the Indianapolis Motor Speedway in Speedway, Indiana on Sunday May 27, 1984. Rick Mears, who previously won in 1979, won his second Indy 500 victories driving for Penske. Contenders Tom Sneva and Mario Andretti dropped out of the race in the second half, leaving Mears alone two laps ahead of the field, and he cruised to the victory. Three months after the race, however, Mears would suffer severe leg injuries in a practice crash at Sanair.

The Firestone Indy 400 was an IndyCar Series race held at Michigan International Speedway in Brooklyn, Michigan. The event was most recently held in 2007. From 1981 to 2001, the event was better-known as the Michigan 500, and was held in high prestige. During its heyday of the 1980s, the race was part of Indy car racing's 500-mile "Triple Crown".

The ABC Supply 500 was an IndyCar Series race held at Pocono Raceway in Long Pond, Pennsylvania, located in the Pocono Mountains. The first Indy car race at Pocono was held in 1971. It was the first major event held at the track, shortly after its completion. The race was sanctioned by USAC from 1971 to 1981, and then by CART from 1982 to 1989, and was known as the Pocono 500. The race was removed from the CART calendar following the 1989 running, due to poor track conditions, as well as poor revenue for the promoter.

The 1990 CART PPG Indy Car World Series season was the 12th national championship season of American open wheel racing sanctioned by CART. The season consisted of 16 races, and one non-points exhibition event. Al Unser Jr. was the national champion, and the rookie of the year was Eddie Cheever. The 1990 Indianapolis 500 was sanctioned by USAC, but counted towards the CART points championship. Arie Luyendyk won the Indy 500, his first-ever victory in championship-level competition, and the fastest 500 until the 2013 Indianapolis 500.

The 1980 CART PPG Indy Car World Series season was the second in the CART era of U.S. open-wheel racing. It consisted of twelve races, beginning in Ontario, California on April 13 and concluding in Avondale, Arizona on November 8. The PPG Indy Car World Series Drivers' Champion and Indianapolis 500 winner was Johnny Rutherford. Rookie of the Year was Dennis Firestone. The entire season, including the 64th Indianapolis 500, was to be co-sanctioned by both the USAC and CART under the banner of the Championship Racing League (CRL). However, USAC withdrew from the arrangement after five races.

The 1992 PPG Indy Car World Series season was the 14th national championship season of American open wheel racing sanctioned by CART. The season consisted of 16 races. Bobby Rahal was the national champion, his third and final career CART title. Stefan Johansson was named the Rookie of the Year. The 1992 Indianapolis 500 was sanctioned by USAC, but counted towards the CART points championship. Al Unser Jr. won the Indy 500 in the closest finish in the history of that event.