Higher octane fuel is actually harder to ignite and burn, and is designed for high compression engines where a lower octane fuel might ignite too fast, or pre-ignite and cause detonation.
The only way you are going to benefit from high octane fuel is if you have a high compression engine designed to use high octane fuel, or maybe if you have a high mileage engine, that has a lot of carbon deposits in the combustion chamber which creates a smaller, higher compression combustion chamber, therefore causing pinging, or detonation, then maybe higher octane fuel might help.
Ford actually recommends against using higher octane fuel if your engine was not designed for it.
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Current:
2007 Dodge Sprinter
2003 Toyota Sequoia
1994 E150 4X4
1955 F250
Gone but not forgotten:
2006 Toyota Tacoma Quadcab 4X4
1999 F250 4x4 Super Duty 7.3L Powerstroke Diesel
1998 BMW M3
1990 Mustang 5.0 GT
1986 Toyota 4Runner
1981 Toyota truck 4X4
Gone and forgotten:
1993 VWagen Fox
1986 Mazda 626 GT Turbo
1983 Chevy K1500 4X4 
1982 Honda Accord
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