Okay, Thats it, I'm using v power from now on.
I get about 330 from a full tank to the warning light. I just done 700 miles this weekend so that was 2 tanks. Did the first half on 95 octane and the last half on 99 octane (tesco, they dont sell tesco super up here in sunny dundee, so when I saw it, I had to try it). But got the same each time. Averager about 32-33 mpg over the whole 700 miles.
Must admit though, It was some pretty heavy motorway driving (The missus was doing about 80-90 for about 300 miles, while I was doing 90-100 for the rest, with a couple short trips to 120ÂÂÂ

).
So I think if I was perhaps a little less heavy boots it woulda been better, but then again, I did dundee to sthingyhorpe in 4h 30 min which I was happy with, didn't want to be much longer anyway.