An F1 car is designed to race over a distance of 305 kilometres while IndyCar races over 805 kilometres every contest. While an F1 race has to finish within 2 hours. In case a red flag has been shown for whatever reason, the race has to end after a time limit of three hours. The race will be stopped as drivers cross the finish line at the end of the duration. IndyCar races can last over 3 hours or longer depending on which track the cars are racing on.  F1 cars have a tank capacity to carry fuel for only one race and are not refuelled during the race. Indy cars are refuelled in between the start and end of the race because the race is held over a much longer distance. Refuelling in F1 was removed due to safety concerns after several high-profile incidents.