# Best fuel for supercar engines

To experienced supercar owners/engineers:

What is the best fuel for a turbocharged 6 liter V8, 7.6 liter V10, or 9.2 liter V12 (Audi R8 or Lamborghini Aventador type cars) in terms of speed/horsepower efficiency and minimization of wear on the engine? Mileage efficiency can be discarded (it can do 4 gallons per mile... not a problem :) ).