im gettin either the C&L or JLT from Evolution Performance, and when I get the tune and re tune the computer, does that mean I gotta get the more expensive gas? Gas is expensive enough as is (thank god I am not in Hawaii from what I hear)

 

Your tuner will come with 3 tunes. Mostly likely one for 87, 89, and 91 or 93 octane. So you can tune your car on whatever octane gas you are running or want to run.