Supermarket fuel

[green van man]

Volvo will tell you do not use additives.

There days engines are electronically controlled to meet set parameters, these settings assume a given standard of fuel is being inputted into the engine. Within this standard the electronics can cope and results will be within the norms, exceed those standards and the electronics will default to set standard and it will make no or little dinference to the outcome..
Go below those set standards and and the electronics will try to compensate as best they can, putting more fuel in to get the readings they expect to see.
Disregard those standards and run veg oil and you are in to making adjustments for the system to work.

My landrover will happily run on veg oil, at least untill it eats the pump seals, it will not however produce 195 bhp and 460 Nm of torque and will certainly not tow the wall of a caravan into a stiff head wind and still hold 60mph, for that I need the volvo and pump diesel.
As to which pump it's down to the driver and what's available, they will all work. I suggest it's the manner of driving rather than the fuel burned has the biggest effect.

Paul.