What type of diesel fuel?

[maxaret]

2 quotes from another forum ...

Sainsbury’s fuel is BP. I have used nothing else for the last eight years with three Volvos and have been very happy with performance, clean running and economy – both petrol and diesel.

I work for bp mate it’s definitly not the same - way more additives in BP and more additive means healthier engine

However...
As far as I know there are only 6 refineries currently operating in the UK so it is probably true that most fuel comes from the same refinery - however - I have seen this sort of comment below quite often...

I previously worked in the Grangemouth refinery.
You are correct that they all get their fuel from the same refineries, but not from the same areas.
Supermarkets, Texaco and the like filled their tankers from another area of the refinery.
Main players (Esso, Shell, BP) got theirs centrally in the refinery from different storage tanks.

So there could be a difference in fuel quality  at source and the difference in additives is well known !
Also there could be higher standards of Tank/Pump maintenance at some branded filling stations