I own a Nissan Navara 2.4 Litre diesel utility vehicle that can do everything that I want it to and more, so why would I want something like a 3 or 4,(even 5 litre) sucking gas up to do the same thing.
I guess it's just a matter of scale and one's perspective. There are a lot of people here in England who would regard your 2.4L "ute" as a gas guzzler. They complain about people driving a 2.0L Land Rover:
http://www.stopurban4x4s.org.uk/The real sad thing about gas prices is rather it is fuel to get you to and from work or toilet paper to wipe you...er...nose, everything you pay for is effected by fuel prices.
Some people don't seem to realize that. I've heard people say, quite seriously, "Oh I don't drive so the prices don't affect me." Presumably they think that the goods they buy just magic themselves from place to place.
On the cash vs. credit card issue, I've never seen any filling station here posting different prices, but due to the merchant fees charged by the banks, many now have signs saying "Minimum credit card transaction £10," or something similar.
Sometimes you can even get fuel
cheaper by using a card. Asda (big supermarket chain, now actually owned by WalMart) now has its own credit cards issued through an independent bank. It's normal MasterCard which can be used anywhere, but if you use the Asda card at an Asda filling station you get 2p/L off the pump price (about 15 cents per gallon).