Octane in the V6 Ex Coupe 99

Perhaps this has been asked many times before, but i couldn't find any thing in the search results.

Do you guys use Regular 89 Octane or do you use Premium 93?

I read a report on http://www.baileycar.com/gasoline_html.html that basically states:

"We ran all vehicles on both grades of fuel, at a drag strip near our offices and on a Mustang eddy-current
dynamometer. On arrival, all fuel tanks were drained and filled with 87-octane Mobil
regular fuel and driven for two days before track and dyno testing. The tanks were drained again and filled
with 91-octane Mobil premium and again driven for two days to allow time for the engine controllers to
acclimate to the fuel type and tested again. All dyno and track results were weather-corrected.

..The Accord took a
tiny step backward in power (minus 2.6 percent) and performance (minus 1.5 percent) on premium fuel, a
phenomenon for which none of the experts we consulted could offer an explanation except to speculate that
the results may fall within normal test-to-test variability. .."

Does anyone else concur or with this and did i waste 45000 miles worth of premium gas?

Thanks in advance!