Sounds good, thanks. Also, am I able to select the grade fuel if I use the mpg tune? Or is it stock to 87?

Is the best mpg going to be the mileage booster, or will it be better with running a premium fuel & premium 91 tune, or other? Also, if I run mpg tune, can I specify 87, 89, 91? Which would give the best mpg? Hope that makes sense.
Thanks

I need to unlock/unmarry a u7137 predator with v.9r04 software (I was sold/they thought they had unlocked). Am I able to do through the forum, or do I need to call in. I've been on hold for 25 minutes.
Thanks