[QUOTE="half_pint"] If the cost of fuel doesnt matter to you then you obviously have more money than you need, your only problem is spending it,[/QUOTE] I suggest you contemplate the implications of the sentence 'The cost per journey is useful'. Fuel is not the only cost of a journey and it may often be a relatively unimportant part. [QUOTE] However some people do have to budget, and its easier in gallons.[/QUOTE] For you it may be. However, you are suggesting that people in general will find it easier to convert from the unit of sale of fuel into gallons and, from that and the price per unit of sale, work out how much they can afford to buy. From what I see of how people buy at filling stations, many, if not most, of them seem to end up with neat round numbers on the amount to pay. That suggests they are buying on the total cost of the transaction, which is probably the easiest way to apply a budget. Colin Bignell