>>212464135The strat where he held up the pack to let his teammate stay in a top spot is realistic. That was done in a race this year, I think Monaco. You can't really pass at Monaco so this one guy purposefully held the majority of the racers some 20 seconds behind the leaders so that his teammate could stay in a top spot.
All the penalty strats don't work because they come with fines and damage your reputation as a driver. They do work in the movie because Pitt is a one-time driver and the team has nothing to lose as far as finances and investors. So the penalties don't matter and Pitt's reputation doesn't matter since he isn't looking to stay in F1.