New Zealand (converted to USD per gallon, includes sales tax)
Petrol $5.28
Diesel $3.84 plus $0.07 per mile road user charges
We pay a lot of tax on gas here. Diesel doesn't have tax (apart from sales tax) but there is a charge to drive on the roads. The heavier your truck, the more you pay per mile. For us, even California gas is cheap when we go on holiday!