Siphoning gas? Hey, that's right up my alley!
Being from the midwest, we're experts in this exercise!!!
I have a piece of clear 1/2" fuel line about 5 feet long that's used exclusively for 'transferring fuel'! Using the old 'tried and true method' of human vacuuming, you can watch the fuel climbing through the clear line. When it reaches a point just a few inches from the 'termination end', quickly place your finger over the end and place it in the gas can. 3 - 4 gallons should only take a couple of minutes to transfer.
I came up with the idea of using clear line after NUMEROUS incidents of coughing and gagging on Hi-Test!
(For some reason I feel I'm gonna regret this. Howie?)