Originally Posted by sunshdw
How easy is it to change the tune from say the Premium back to stock? I tow a 5500lb camp trailer and I doubt that any of the "tuners" would be good idea to use while towing.
The price is a definate plus with the hypertech however I'm leaning towards the Diablo with a hemifever tune for ease of changing tunes on the fly.
My understanding is it auto adjusts to the octane u put in via the sensors. I myself have been running 93 only.