I use my 182A steam gauge as a tow plane in our small glider operation. We just started our business in May. This weekend I had 9 visiting sailplanes from a distant soaring club. I towed for three hobbs hours today. That ended up being 12 tows. When I fueled up at the end of the day I pumped 23.8 gallons of 100LL into the tanks. I filled it yesterday so I know the tanks were filled consistently both times. That's around 8 GPH! I really thought towing gliders would burn much more fuel. No big issue here i just found it surprising.