However racing is racing, most racers given the opportunity will go for the race win and/or go to great lengths improve their machinery.Considering the stupid money people pay for some of Don and Gary's period crap, using decent fuel and tuning for it, is a very cost effective way of lifting throttle response and the engines output.Shaking a can and pouring it into the tank is pretty simple, requires no tools or skill.
Hoony I can gaurantee that with a engine in a resonable state of tune, that after using 110 ,no way would you go back to 91 ULP.