If you're not tuned for it, the higher octane does nothing for your performance, or 'deposit removal'. It's a complete waste of your money.

You'll get more mileage (literally) by pumping your tires up a few PSI. 

 My car needs it. I have turbo i have a few things. Plus i have the mileage counter thing and 87 or 89 dont get me mileage like 93 does stop listening to car dealer people they want your car damaged  

 Right on, gotta do what you gotta do.

What supernsucks is being tuned for 93+ then driving in an area where that's not a thing. Bad day right there.