gas

with the supercharger it says have 93 octane gas but what it u put lower..meaning middle grade..does it hurt the engine or just not give the same power?

lower octane = knock (detonation in engine) = damage to your engine. You want 91-93 octane in there at all times..

You might be able to get away with it if you keep RPM's under 4000, but it's not recommended to use regular gas (87-89 octane) at all.

And using lower octane in the summer is a doubly bad idea - higher heat increases the tendencies for pre-detination (knock).