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Out of interest, I would like to know what fule folk use in their RS cars?

Shell V Power or the equivalent OR
Standard 95 RON fuel

I'm sure this has been asked before, but has anyone dabbled in a test with their own vehicles to see if there is actually an advantage with the uber-expensive stuff, mpg-wise?

Cheers guys

The UK cars are mapped for 98 Ron (on my build list) and they dyno around 350bhp running v power

Mine only got v power with tescos as an emergency

Only use 99 Ron.

I take it the 99 Ron is only tesco fuel? Whats wrong using Shell V Power?

chrisrs3 wrote:I take it the 99 Ron is only tesco fuel? Whats wrong using Shell V Power?

v power is over 99, normally around 99.5

I thought Shell V Power was 97 Ron? Thats what the pump says?

V-Power is and always has been 99. It's predecessor Optimax was 98.

As they dont sell 98 Ron around where I live, I can report that the RS3 runs perfectly well on 95, no problems whatsover

It runs noticeably better on Super Unleaded (Shell V power) than it does on normal unleaded - throttle response and pickup is much quicker and the car feels much livelier like it has more bhp (which it probably has)

scillyisles wrote:It runs noticeably better on Super Unleaded (Shell V power) than it does on normal unleaded - throttle response and pickup is much quicker and the car feels much livelier like it has more bhp (which it probably has)

Super unleaded also has a lower sulphur content which means the pre-cats get contaminated slower so there have to be less pre-cat clean cycles (which change the injection timing and ignbition timing to make the exhaust gases hotter by burning more fuel).

So super unleaded also gives about 10% better mpg, so if super unleaded costs less than 14p per litre more, it actually works out cheaper per mile than normal unleaded (as well as giving more bhp) = win/win.