Gas in Oz...
Well, for a start, we call it Petrol, and buy it in Litres.
Prices have swung between AU$1.20 and AU$1.30 per litre these last few weeks. It's 3.785 litres per US Gallon, and 0.85 US$ per AU$. so we're paying US$3.86 to US$4.18 per US Gallon.
Not a whole lot different (and it's mostly due to tax)