we were paying about $1.52 a litre here last week Andie and that by no means would have been the most expensive in Australia Not sure how to do the conversions to get it to USD per gallon but I am sure you will somehow knowing you!!!
We use diesel and our 4 x 4 takes 100 litres at a time. Makes a dent in the pocket, especially when we are travelling and may fill up twice in a day. It's still fun travelling though.