I think this sums the whole debate up quite well.
Article written ,Chris Thompson CAE Eng Tech AMIMI, of the Stag Owners Club.
Recently, I was surprised to find the hose connecting the filler cap to the tank on my 2005 car had perished. I think this article provides the explanation.
I note that fuel pump failure is also mentioned. It may just be a coincidence that my fuel pump failed last year.
I have always used Shell - I think it's now time to re-evaluate this policy.