I currently use high octane petrol (`Momentum` or `V Power`) in my 3.5 V8. Would it be a waste of money (5p per litre extra) to use it in my 1.8 Superb (when I eventually take delivery of it)?

welcome to the forum....

I don't klnow about the 1.8 superb (post in their section)

BUT I have a mark II fabia vRS which is designed to use 98 octane fuel, and its only happy on high octane... I've found it gives about 3-4mpg more anyway to 95, so offsets the cost,

anyway, there are lots of arguments (*cough discussions) on here about it, but even if you dont beleive the higher power and better fuel economy (true on the fabia vRS as the ECU will retard the ignition if you put 95 in, to prevent detonation) its full of more cleaning addatives ect to keep your fuel injection system healthy, and hell, it still as cheap as diesel!!!

Absolutely agree. I have done a lot of testing on this, as my wife was constantly moaning about me buying 98 RON fuel (or I tend to use Momentum too, which is 99 RON).

On weeks worth of tests, we constantly get 34 mpg average from our Octavia VRS 1.8T when using V-Power or Momentum. When we use standard 95 RON, that will always see a drop to around between 30.5 and 32 mpg.

So higher octane in our case also does pay for itself, and gives cleaner, more efficient engine running.

My wife still finds it instinctively hard to buy more expensive fuel, but it really does pay for itself.

Edited 5 June, 201214 yr by Longyear

welcome to the forum....

I don't klnow about the 1.8 superb (post in their section)

BUT I have a mark II fabia vRS which is designed to use 98 octane fuel, and its only happy on high octane... I've found it gives about 3-4mpg more anyway to 95, so offsets the cost,

anyway, there are lots of arguments (*cough discussions) on here about it, but even if you dont beleive the higher power and better fuel economy (true on the fabia vRS as the ECU will retard the ignition if you put 95 in, to prevent detonation) its full of more cleaning addatives ect to keep your fuel injection system healthy, and hell, it still as cheap as diesel!!!

Thank you for this.

Absolutely agree. I have done a lot of testing on this, as my wife was constantly moaning about me buying 98 RON fuel (or I tend to use Momentum too, which is 99 RON).

On weeks worth of tests, we constantly get 34 mpg average from our Octavia VRS 1.8T when using V-Power or Momentum. When we use standard 95 RON, that will always see a drop to around between 30.5 and 32 mpg.

So higher octane in our case also does pay for itself, and gives cleaner, more efficient engine running.

My wife still finds it instinctively hard to buy more expensive fuel, but it really does pay for itself.

Thank you for this. Needless to say I will continue to use high octane in the Superb.

If your Superb comes with the 1.8TSI engine, then the recommended fuel is 95RON. I tried a tankful of V Power in my Octavia with that engine but didn't notice any benefit in performance or fuel consumption. JMTPW.

Hi and welcome aboard.