Can I run my 1991 Scirocco on super unleaded and fuel additives?
I have a 1991 Volkswagen Scirocco GTll. At present I am filling my tank with Sainsbury's Super Unleaded and adding a Millers VSPe Power Plus fuel additive. I believe my car was converted before I bought it to run on unleaded from the old four star, but by using Super Unleaded at 97 Octane and the additive gives my car effectively a 99 Octane. Am I justified in going to this extra expense and will it help with the performance? The car is regularly maintained and serviced lovingly. I am a 67-year-old boy racer and I love to push the car.
Asked on 12 January 2013 by CH, via email
![](http://images.honestjohn.co.uk/imagecache/file/pad/120x120/media/16477727/537450_458533677529584_1473549666_n.jpg)
You are probably okay, but what happened was that when unleaded came out a lot of owners had their engines retarded to run on the lower octane fuel. I ran GTIs at the time and on 95Ron unleaded they were sluggish. So I had them advanced back and ran them mostly on Texaco CleanSystem 3 97Ron (at the time) with excellent results.
My advice is, after making sure that your timing is advanced to take advantage of 97-99 Ron petrol, I would run the car on it, preferably Shell V-Power because overall that's the best these days (there's no need to advance/retard with more modern cars because the ignition advances and retards automatically).
My advice is, after making sure that your timing is advanced to take advantage of 97-99 Ron petrol, I would run the car on it, preferably Shell V-Power because overall that's the best these days (there's no need to advance/retard with more modern cars because the ignition advances and retards automatically).
Tags:
additives
premium fuels
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