1 US gallon = 3.78541178 liters
Lets say you Americans are paying $3.00USD for a gallon (3.78 liters)
We Aussies are paying $1.40AUD per liter.
Which works out to be $5.29AUD per gallon.
But 5.29AUD works out to be $3.6USD
I always thought we had it heaps worse, but it doesn't seem that bad now.
If the poms are paying $1.00GBP per liter, then thats $3.78GBP per Gallon.
Which works out to be $6.27USD per gallon.
So to recap.
Americans pay $3.00USD per gallon
Australians pay $3.6USD per gallon
Poms pay $6.27USD per gallon