(Sits back and waits for a barrage of " nonsense,nonsense" from from the usual suspects)

Presume I am a "usual supect" and of course its nonsense. I have been using supermarket fuel for almost 30 years and never had an issue. Problems can occur but they are very rare, problems can affect branded fuels as well.

Just consider how much fuel Supermarkets sell and how many problems you hear/read about and how often do you see a load of cars broken down after filling up at Morrisons (or any other supermarket).

Until I see every car in our local Asda immobilised because of the fuel they sell I will continue to buy their fuel.

(Sits back and waits for a barrage of " nonsense,nonsense" from from the usual suspects)

Ok, I'll fire the first salvo.

If you actually bother to read the article you'll find that the problem was not due to substandard fuel, but a faulty storage tank that allowed the ingress of water during a heavy rainstorm. Add rainwater to any brand of petrol and you will have running problems.

It's worth noting that the ASA ruled against Shell's fuelsave adverts because they were not satisfied that Shell could reliably demonstrate a 2% improvement in fuel ecovomy over 'ordinary' fuels.

If branded fuels were demonstrably superior their makers would be falling over themselves to provide quantatitive evidence. Instead they fall back to the usual advertising cliches of macho tradenames and scientists in spotless labcoats holding conical flasks of coloured effervescent liquid (because stupid people think that's what scientists do). Toss in a reference to Formula 1 or Ferraris and you have the perfect marketing formula for aspirational motorists.