Originally Posted by Hpimichael

hye guys, how do you tell if nitro fuel is bad?? i have a full gallon i only used about 3 tanks out a about a year ago, its been sitting in a box in my shed , i just found the fuel , and it still burns and does leave an oil mark like myu brand new fuel, but it does seem to burn longer about 10-15 seconds longer, and they are both 20% nitro....