The Australian obsession with petrol prices and saving a few cents on filling up has long been a somewhat puzzling and fascinating thing to me.
With the supermarket dockets, if it's no hassle to do a shop for >$30, and no hassle and not out of the way to go a petrol station where you can take get the 4c/litre off, then that's fine - I'd do it myself.
I shop at Safeway (closest supermarket to home) but I have no idea where the nearest redeemable servo is. Certainly not as close as many other servos. So on an average fill of say 40 litres, I would save $1.60, but how much do I spend in fuel, wear and tear, and time, to get to the servo to do it?
The real oddity though is the 'special promotion' where a station in an outer suburb sells petrol at, say, 25c a litre off for a day. If what is reported is to be believed, people drive halfway across town and queue for 2 to 3 hours, just to fill up at this price. At a 40 litre fill, you've saved $10. To put it another way, if I said to you, there is $10 sitting in the middle of the road for you, you've just got to drive 20km to get there, and wait 3 hours to pick it up. Does that sound as attractive?
Sorry for the OT-ishness and hint of rant - I just don't understand the obsession with saving a few cents per litre (especially when it costs a lot more to put yourself in a position to do so).