How much gas is there in the hose and nozzle plus the pump back to the valve that separates the different grades? I asked the attendent who is an engineering student at Carleton U. but he didn't know. As most people use regular and it is recommended we use a higher grade how much or the cheap stuff (relatively speaking) am I pumping at a higher price before I get the good stuff? The tank isn't that big so a few litres will tip the balance quickly. Maybe I should bring my lawn mower with me and fill it up first.
