I have
no idea about advertising hype so much, but they do have special additives for each of the fuels.
I'm told that the diesel base stock is the same. Mate delivers to country BP and Caltex's, but the fuel he loads comes from the Mobil refinery!
There are specific bays they load from that have the links to each fuel type, but diesel is diesel .. is diesel! .. basically the same for truck diesel, same for car diesel, same for premium diesel ... except with the premium diesel they have to add some additive.
They push buttons on some electronic device for their load number and it's all automated, but there is definitely an additive in the premium diesel for Caltex and BP.
Whether the additive is useful of hype .. I dunno!
if it were mine, that is if my diesel were more modern, and not a 300 Tdi .. even a TD5 with their more finely honed injector types, I'd use it more so than not. Obviously out bush you'll probably struggle to find a premium diesel type, and I doubt it matters as that's all you may have access too, but on the whole I'd use the premium stuff, or at least alternate between each.
It's definitely more detergent-y and foams up a lot more than most regular diesels do.

