I have a good nose for it and I can tell you for 100% SURE that some(or at least one) of the cars are running oxygenated race fuel-at least they were when I last attended a race. With the proper tune up, I have made LOTS of power with that fuel on the dyno. My feeling is that they should at least have a spec fuel that is dispensed at the event and the tank cap sealed by a tech official. This would be a very easy rule to implement( I would think) and might eliminate some of the possible issues there...
