86 octane

[miloman]

I am about to order some custom tunes and commonly run 86 octane. I live at 6700 ft elevation. Should I purchace 87 tunes or 85? Which would work better for that gas and elevation? Thanks Milo

[cleatus12r]

Customer's question was handled over the phone.

[miloman]

Again thanks For your Help! Im excited about the gryphon and the 87 tunes.