what kinda fuel

[squeeforever]

I would...Have you had a look at the top of the piston? My 2.5R ran 20% Traxxas on the first piston and sleeve, I then had to rebuild and break in the motor at the track and was told to switch to Trinity 30%. All I could say afterwards was WOW! Not to mention, the top of the piston looked almost brand new after a gallon of it. The original didn't look so good...