[yankcollector]

Just bought a 2001 mustang gt that has a hypertech (#41005) tune. I can't locate the origional owner who had this done so I have no idea what octane I should be using and hypertech isn't open on the weekends and I need gas. Any help would be appreciated.

 

[BlueStreak03]

I would get just enough of the good stuff as you need to make it through the weekend and call hypertech Monday.