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Firstly 95% of people won't ever use more than about 70% (if that) of the power the engine is capable of...(no idea if these figures are right as I made them up by observation over many years)

A JCW with top speed of 150mph, when will that ever be used? Even through the gears I bet not many get anywhere near the red line!

On my last R55 JCW when if was having issues and I decided to sell I used regular unleaded and to be honest never noticed any difference, mpg same, running around same,maybe a slight hesitation when flooring it!

By doing this I gained a few pound a week in my pocket.

So yes I think it is a waste of money...
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