Lots of hobby shops carry blue thunder. I have always run it and been really pleased. Do you want to know if you need to run a higher percent because you have less oxygen? I would think you want a little more nitro content to make up for the lack of oxygen in the air at the elevation but I really dunno. Maybe someone else knows better.
Whatever RC Car fuel is available at your Local Hobby Shop (LHS)
The fuel is a matter of preference and you will hear opinions on all of them from A-Z. Us an easy to find brand in your aria.
i am using blue thunder right now it is working ok i just thought maybe one was better than others. thanks guys i will just continue to use what i am using.