Remrats1234

I have an '05 GT and I run nothing but premium, The car just drives a lot smoother.

Sonic Boom NH

I have a 06 GT 5-speed manual and I haven’t noticed any problems with the throttle response at all. That may be due to it being a manual rather then automatic. I have to say my gas peddle reacts instantaneously if I sit there and stab it, even gently, it pushes you back into the seat a bit. It really doesn’t feel like drive by wire at all but just like any mechanically linked fuel peddle.

As far as losing power or gaining power neither is going to happen regardless how you drive. The vehicle has a specific amount of horsepower and torque, some may have a bit more then others because they are massed produced motors, but nothing that is a “lot” different from one vehicle to another.

Unless you are tuned to run a higher octane 87 will be fine. To run 89, 91 or 93 is simply a waste of money as it has absolutely no benefit at all when it comes to power or how a vehicle runs and can actually be bad for a vehicle to run a higher octane because they will tend to leave more deposits behind since they burn slower.

The higher the octane the slower the flame front or burn of fuel. If you don’t have the correct plugs AND/OR tune for the slower burn you will lose some performance and “could” have more deposit left behind then normal. So basically the only thing running a higher octane does for a stock vehicle is to put more money in the pockets of the oil companies and fuel stations owners…