The manual says that you want to put at least 87 octane into the tank. 91 is optional if you want the increase in horsepower.
Mazda has stated that there will be no difference in longevity putting 87 or 91, and 91 is only for the horsepower.
The engine has a compression ratio of 10.5:1. For comparable cars, the RDX has a compression ratio of 9.8:1, the x5 has a compression ratio of 10.2:1. Both recommend 91 octane. How is Mazda able to recommend 87? Additionally, back then, weren't all turbo engines supposed to be 91 octane and above?
So what do you guys put in it?
Mazda has stated that there will be no difference in longevity putting 87 or 91, and 91 is only for the horsepower.
The engine has a compression ratio of 10.5:1. For comparable cars, the RDX has a compression ratio of 9.8:1, the x5 has a compression ratio of 10.2:1. Both recommend 91 octane. How is Mazda able to recommend 87? Additionally, back then, weren't all turbo engines supposed to be 91 octane and above?
So what do you guys put in it?