My Tec 8 is probably only doing 30 miles to a tank. I'm assuming its a gallon
The trip I usually take on it back from when I rode a bike with a speedometer is around 25 miles round trip. When I get back there is about an inch left in the tank.
Thats riding the crap out of it, full throttle down the logging roads, climbing hills, trail riding, and just basically flogging it the entire time.