My father has always marvelled at how much we in the UK are willing to pay for a gallon of fuel. Nowadays, petrol and diesel are roughly the same price (at least in the UK). We pay £1/litre. There are ~4 litres in a gallon. That works out to £4/gallon. Given the current exchange rate that is ~$8/gallon. So stop complaining about $3!
Here is a funny little article about the price of gasoline in the USA and what you might be willing to pay (or not).