How often have you poured gas into your lawnmower or snowblower, looked down at your shoes or the tires, and seen gas dribbling on them? Gosh, darn, you tightened the spout on as much as you could.
Somehow, a couple of years ago, after decades of frustration, I came upon a little trick to get the spout on really tight. Most of the time, that is.
Place the spout 1/4 turn counterclockwise from where you want it, place the screw ring around the spout, hold the spout a bit up and in its turned position, and tighten the screw ring as best you can. Then without holding the spout, tighten the ring even more. The spout should turn close to the desired position.
Now, maybe, just maybe, the spout should be the gas can sufficiently tight so that no gas dribbles out.
Of course, all bets are off with these new "safety cans" with their little stops to prevent accidental opening. Of course, they also deter planned opening. How can something be safer if users become so frustrated using it that they become careless in some other aspect?