Well it shows what it should. Early on in the RPM cycle, you see greater gains in horse power and torque in 91 octane fuel. But as you get higher (it looks like above 5500 rpm) you get better torque and horse power from the 104 octane fuel. No big surprise. That's how NASCAR vehicles are able to run at such high levels of horse power. Unfortunately for those of us with vehcles limited to 6500 rpm and redlining at 7000 rpm, 104 octane fuel just doesn't offer an advantage.
