Im not worried about the cost, Im just curious to what the general consensus is. This hobby allows me to fulfill my dream of flying, and its how i can afford to fly.

The reason I am asking is that this winter I will be building a 40 sized trainer and to get an idea on what i should budget for fuel. My LHS has 10% for about 15-17 per gallon. As rcken earlier stated that 128oz/8oz is 16 tanks per gallon. with a 15 min flight, a gallon will last for 240 min or 4 hours per gallon. My thinking is when the weather gets warmer, I want to be out and fly, and lets say i go through a gallon a week, that would be roughly 60 to 68 per month. I know that isnt bad, with roughly 16 hours per month of flying time, but i must be cautious with my money. I have student loans and a wedding to save up for.

Now with learning about 15cc sized engines, I may look into a 60+ sized bird to fit it into. That is if i can get it to fit in my small Nissan Sentra GXE. At that point I can fly my hearts desire and not have much of an impact on the wallet.

I understand with gas engines I wont get the same power to weight ratio. My goal in this hobby is to fly scale and smooth aerobatics. I am not interested in 3D flight. So I think that gas would be great for scale flight.

I hope this helps make more sense of my situation.