Had a little run out today to get the tank close to empty so I could fill up with 'super' just in case it doesn't get run for a month or two over winter. If it does go out I'll top up with the same.
Put Esso Synergy Supreme in it (how much!!! ..... 158.9 a litre seeing as you asked).
Although I was surprised to see that, within a mile of the petrol station, I was seeing the display showing 70.5mpg. I had E10 in it before & on the miles before filling up today I was seeing 60.6 at best. I had a play after filling up & the worst mpg I could get was @ around 6k rpm in 6th gear for about a mile on a dual carriageway & that was showing 65mpg.
I was surprised to see that much difference. I thought it was running smoother & better too.
Sadly no breakfast today, as a poor pensioner I can't afford petrol & food!