Originally Posted by AP328

We have 94 Octane in Alberta, too, although only at a few stations in major centers. I am running the 93 as well. I would be interested to know the horsepower and torque difference between 91 and 93 Octane tune. With our Mazda Speed6, going with 91 Octane results in a loss of about 30 hp, or about 10%, so quite significant.