Q: What’s the best way to save fuel while racing?

Q: “I was having a discussion with a buddy about fuel management while racing. I know that if things are getting dicey, drivers will start to coast at the very end of a straight, for example. But how common are other techniques, especially in long endurance races? Is short shifting common? Will people be running 90% throttle down the Mulsanne Straight at Le Mans if they’re not feeling threatened? FWIW, this conversation was born from laughing at the number of times in movies that two cars will he racing down a straight and the drivers will then do something (downshift, upshift, more throttle) to jockey for position instead of simply being wide open to redline in the first place.”