How about what fuel does your local hobby shop have on the shelves, followed by how much and how badly do you want to shop on the internet or fuel?
I ask these questions because it might cost you a small fortune to follow the advice of the forum if you have to purchase your fuel online. If your hobby shop carries a particular brand, you might want to look it up and see if there is any negative press related to it.
I use Blue Thunder, one because I can get it cheaply and in large quantities from my LHS and two because I have never needed to change from it. Blue Thunder works just fine in my mills. I run RB Concept engines in my buggies, and before that I ran Ofna Hyper .21 8 port engines in my MTs. Blue Thunder ran just fine through them.
Just note that the truck is not what consumes the fuel. The engine does. If you have a high end engine, there might be some manufacturer recommended fuels to run in the engine. There might also be some manufacturer recommendations about what fuel NOT to run. Most stock engines do fairly well with most fuels. Which takes you back to looking into what you can get in a ready supply.