There was a article about this in a RC mag before. Basically by the time you buy a bunch of good packs and replace them after they start to slow down some you spent just as much as a nitro. Not sure how big of a tank the truck you mentioned has but heres the conversion for you 1 US gallon = 3,785.4118 cc. Also i know XTM are hard to find parts for. Make sure you can get all the parts for the truck before you buy one. I had to search on teh internet for like 15 mins one time trying to find a pullstarter for a friend for a xtm car.