This might be little silly question, but I still have the same 87oct tune that I installed 3 years ago.
Planing to run couple of tanks different oct fuel and changing tune. Here is my question how do I change the tune? Do I just plug the SCT tuner to my OBDII port and follow prompts, when asked different fuel oct, just change it?
Or is there something else I need to do...

Looking for info!

 

It should be plug n play, following the prompts.

 

Since you have brenspeed listed in your mods, I assume you have three different tunes on your sct. Select custom tunes and then select the higher octane tune.

 

Yes, follow the prompts and select the custom tune that matches the octane you switched over to. It's super easy!

Here's a refresher video.

 

Thanks for the info