That's a myth mate... there basically the same fuels as the stuff sold in BP, Shell, Texaco etc garages... There was some bloke on here a while ago that worked for the oil refineries who confessed that it was all the same just branded differently. The problem with the recent tesco fuel in the south east was silicone in the fuel.
Not so. I have a friend who works in a refinery. The Supermarket fuel isn't of the same grade and is sold cheaper due to it's quality not being quite as good. The main oil producers refine it, sell it to the supermarkets though it isn't as good as their braded product. Same as Heinz beans. The cheaper supermarket version is made by Heinz but not as good, hence the price difference.
In usual average cars it doesn't make so much of a difference. These aren't average, nor are they usual.
