I agree, I stick to Shell diesel on my 170,000 mile diesel wherever possible
On my petrol cars (both are 34 years old) I use Shell premium (whatever name they call it this week) because of the higher octane/RON which I have the cars tuned to. I might need to change to Esso premium as this may be the only ethanol-free fuel now available.
When I take my engines apart I am amazed how clean they are, and I've never had my diesel's DPF clog up (it doesn't do flashy things like regeneration).
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell
When the debate is lost, slander becomes the tool of the loser. Socrates