Norway is very expensive yes. For other countries perhaps milk or soda would make for a better example. In any case, gasoline and diesel is remarkably cheap, especially when you consider the whole process involved in getting the fuel from beneath the ocean floor to the pump at your local gas station.
Oh, and you say gasoline costs 1.54€ per litre where you live, but that includes all the taxes. In Europe gasoline prices are artificially high. One litre of gasoline in the US costs around 80 cents per litre at the pump, including taxes. So the real price of gasoline, what the oil company gets, is about half a Euro per litre.