I should make a video,, (Somebody probably has??)
ANYWAYS,,,
instead of pouring any jug with the spout "down", pour with the spout rotated 90 or 180 degrees.
When the jug is rotated, there is much more room for air to enter.
This works for oil and antifreeze gallon jugs especially well.
It also works on 5 gallon jugs.
Also, when an oil 5 quart container is poured when rotated, it is almost impossible to spill oil.
(The pour opening is MUCH closer to the hole you are pouring into)
Many times, you can pour oil directly into an engine fill opening, without a funnel.
It is AMAZING how much faster a container will empty when there is no glug, glug, glug happening
As the pour jug approaches being empty, you can rotate the pour spout back to the bottom, to finish emptying.