Talk Morgan Forums Community The Malvern Arms Is it worth using super unleaded in a Plus 4?

I seem to remember others have commented about the relative ethanol contents of different grades. Personally I always use the higher octane or 'ultimate' ranges of both diesel and petrol as I have convinced myself that they offer better mpg and performance. As all my mileage is nearly all for pleasure these days and is relatively low for both my cars the extra cost is not really a factor in my choice though.