Tune a 4 stroker right and give it time to break in and you will get way more than 4 flight on them per gallon. A gasser would be cool to but you have to look at the weight of the gasser I do not have a gasser so I can not really speak on them, and I am the type of person that if you have not done or messed with it do not speak on it.... The two stroke should be fine too. Pretty much try to get and engine that is in the higher markings of what the manf. recommends and you will be fine. And yes glow fuel is to D...n High! Some gasser to cost more but from what I have seen at the field some people fly off of 5 dollars of gas and oil mix for a long time, and it does not get your plane oily.