Freshman Inquiry: Sustainability

I read an interesting article about a sustainable race car that runs on chocolate.  It is the first of it’s kind, and so far it has been reported successful.  The car is made up of items like woven flax and carrot pulp for the steering wheel.  It runs on chocolate and animal fats and is lubricated with plant oils.  The Formula 3 team is hoping to prove that sustainable high performance cars can preform just as well as a regular competitive car.  My question is; can racing cars ever be a sustainable sport?  Are these alternative ways of thinking actually making a difference in the world, or does it need to be more extreme to make a difference?