As this article in The Age states the cost of petrol/gas here in Australia has risen quite substantially recently and even though we seem to be having a hard time of it compared to other countries we now have to ‘think’ about whether our journeys are really necessary. If I can share my reasons for driving I will, meaning I’ll plot my drive to include various stopping off places along the way there and back. It's good for my bank balance and also for the environment.
The price boards outside the service stations here have various prices on them and if we shop at certain supermarkets we can use percentage off dockets at their service stations and get it at a reduced rate. These boards have the regular cost and also the discount cost but on reading this article at beingfrugal.net it seems motorist in some states in the USA have something else to worry about in regards to the price of their fuel.
Here in Australia there are some shops and companies that charge an extra percentage for credit card purchases but I don't think its reached the oil companies yet. I'd hate to have to carry cash around in the car just in case my service station decided to charge extra if I paid by credit card.