Wow, seems pretty low rating on the fuel over there. In the UK, standard is 95 RON, with most super unleaded being 97 or 98 for V-Power or BP Ultimate. However Tesco's have the highest commonly available at 99 RON, and it's also the fuel that's supplied to the British Rally Championship, so should be good, although I never used it in my S4.Here in the US we use a different method. Our fuel is 91 octane minimum and I have 1 station (BP) that has 92. I have seen no difference in the S5 using either fuel. However with the STi there was a difference as it was tuned to run on the 92 from BP.
99 Octane from Tesco is suppose to be best from a number of fuel tests I've read in the past.V-Power all the way. BP Ultimate doesnt compare.
Used to use V-Power on the Alfa, and now with the A5 I use V-Power Diesel.
There's a big one on London Road, near the start of the M74, that has it. It has 2 pumps.99 Octane from Tesco is suppose to be best from a number of fuel tests I've read in the past.
Here is one test:-
Rab which shell garages in Glasgow now have V-Power Diesel?
This is definitely true. The main reason is to help eliminate the water that comes out of their tanks and into yours. A busy station keeps this mixed up and going back out the door.i read somewhere however that fuel deteriorates the longer it is left in the tank. so always best to buy from a busy petrol station