Stilly River Sage wrote: So for all intents and purposes, there is a shortage.

There's certainly a shortage in my petrol tank! I've had to cancel a weekend away.

What will probably happen is that everybody will go from filling up their vehicles when they are ¼ full to filling them when they are ¾ full. So there will be a short term surge in consumption of
(number of vehicles)×(mean fuel tank volume)×0.5
After that it will calm down.

There is actually a shortage of gas, in that consumption has soared (for several reasons) and producers (Russia for example) have declined to increase supplies to Europe, even at unprecedented prices.