Onetrack, I post on this forum when a. I think that my experience can be useful to other readers, and b. when something strikes me as being either false or deliberately misleading. I am used to the mainstream media deliberately misleading and why not? They are after all owned by the rich and powerful.
In this case I noted that you gave no attribution for your claim that fuel retailers operated on ridiculously thin margins. The fact that the best information I could find was a year out of date is perhaps not surprising. Who is going to bell the cat. As for quoted info on 'at the depot' pricing , supplied by the industry, that can be easily manipulated if not intentionally misleading.
Recently, when traveling to Tumut, I found the pump price for unleaded 91 was 10c below the best price available in Canberra. This shoots down the argument that high volume results in lower margins.
I apologise for my fishing comment regarding your possible links to servos. But being obviously busy, keeping up with every topic is very time demanding. No one knows everything, not even (ahem) me!
Many fishy things about the fuel industry including the restricted number of major participants. Coles and Woolworths , in particular, are huge retailers but have meant bugger all in terms of discounting grrrr! The fact that increases in prices occur almost instantaneously over an area lead me to believe that fuel is sold on consignment and the majors dictate prices to the stock holders. This leads me to be sceptical on the evidence you quoted of prices 'at the distributors gate'.
As on many things we will just have to agree to disagree. But don't be sucked in by mass media sources; seek information widely. Don