The first lap of the race is not officially scored until the cars cross the auxiliary start line on the backstretch. This removes approximately one mile from the first lap's distance, although teams still must factor in the distance in fuel calculations. From 1983 to 1989, the 84-lap race on the 2.4-mile circuit had an official distance of 200.25 miles. Likewise in 1990, the race distance for the 89-lap race on the 2.25 mile circuit was 199.3 miles. Though the race distance in laps has changed over the years, a similar deduction is still made in official race distance with respect to the race mileage.