I do not have the magazine in front of me but

Regular gas was approx 1* advance then detting
Tesco 99 3* advance then detting it's tits of
Ultimate 97* 10* advance the detting
Optimax 13* advance then detting

There was if i recall abouyt a 35/40bhp difference across the range as well from i think 410bhp to 450bhp was alot but dont quote me on the above figures


Mike