filled up with regular unleaded this morning and got 127 to the light, this afternoon on the new fuel got 110 lol, but was wellying it somewhat.

any opinions on differrent fuels vs economy vs performance?
in my mg i will only use superplus type unleaded with 97 octane, seems to run a lot better on it.
tried it in the storm but tbh can't say it's any better for the extra 10p a L