Here's what I do.
I tune the car at the fuel I will use everyday.
Which is Mobil Synergy 8000 (Yay for Fuel Cards!!)
Then, put a gut full of V-Power EXTREEEEEM RACING SICK BRO VTECH YO fuel in and take the car to your tuner.
Have then spin the thing up on the dyno and using the blanket adjustments in the PFC adjust fuel and timing to suit.
Then, when you want to go racing, put the fuel in, adjuste blanket timing and fuel numbers and go play.
that way you don't have to get nervous about going long distances and not have access to the fuel.
Also stops you from having it tuned with the good fuel and having to adust blanket numbers every time you get in your car.
BASS OUT