20% 10% ??
 

what is the differences between those two? I have a t-maxx 2.5 and which should I use?

You should always use,
 

What is recommened in the manual! These engines are built to run on X % of nitro! At least kept within a range of +- 5%! 20% is what the manual says! :cool:

20% 10% ??
 

hello and thx for replying...
the instruction said use either one and stick with it. so i wonder which i should choose

You can change % but,
 

I would not do that during break-in! If you are getting the 10% at a much cheaper price then the 20% then go for it but, if it cost about the same then get the 20%! You will get more power with the 20% but, if you are just bashing it does not really matter! :cool: