ChitownRC

Do I really need to use just Top Fuel for the Trx? Becasue I remember with my sportmaxx it had the regular 2.5 and it said that I needed to use Top Fuel or it would void the warrenty.

no

and no.

possibly NO

Nope, you don't need it, there is no way for them to tell, just don't use Blue Thunder, it dies the P/S a blue color and they might saying something when you go to trade it in.

Even people who have used blue thunder, or told traxxas they were using some other fuel, sent their motors in without a problem.

use any fuel you want!