I run mine on Tesco 99. Its about 9p per litre more expensive (7% - ish) but I believe the slightly better mileage just about makes up for the additional costs. However, even if it doesn't "pay", the car drives so much better on posh I'd just use it anyway.
My missus has just moved into a brand new house and the garage is too small for her Kia ceed, and my fiesta so she kindly offered to let me keep the punto there, which is a bonus as it’s actually part of the house, not a seperate building like it’s current garage, so will always be warmer, and more importantly, not damp during the winter.
It is a lot smaller than its current home, but that’s a small price to pay as it will be better preserved here, and it’s always with me now not 6 or so miles away.
Absolutely ridiculous that with a brand New house, you cannot fit a traditional family sized car into the garage…..