Octane question..

[spoolin54]

I was shopping for a genesis before this car...and i saw that the genesis uses 87 octane.

Is anyone running 87 to save money? Using 91 and 94 is becoming pretty expensive.

[PearlM3]

For the speed you need to use 91 or you'll get engine knocking!

[Pokey]

^^ while all other Mazda 3's can use 87 without issue (unless you've got some mods)

Oh and check the horsepower ratings on the Genesis - IIRC there are two posted (for the sedan) one with 87 octane, one with 91.