I fly mostly .40 to .60 sized 2-strokes. I usually go through about 5 gallons of glow fuel in a year. I have been paying $15 a gallon, so $75 total fuel bill for a year of flying. To put this in perspective, the round-trip drive to the field in my SUV costs me (twice a week during flying season - about 50 trips) about $500 per year.