I found that when I used V-Power Nitro Plus in my 500 Twinair it pulled more smoothly at low revs. I didn't notice any improvement in fuel consumption. However, I've decided that it will be my fuel of choice in my 500X due to its cleaning additives, which should help prevent injector problems. I only cover 5-6000 miles per year so the extra fuel cost isn't significant.

Just 5 pence more is not that much,I just get 21 liters so now is full with half of 95 octanes and half of 98/99 V+...will check that ...but more octanes in petrol make engine working easier ( less tourboulences / shakes for engine ) will update how i do...
Hovewer done few longer run and average rise now to 32.8...lodon and around...
Looks not that bad for that size of car and 18 inch alloys...average is 9 liters per 60 miles and i think will improve when car/engine will reach about 6-8k. ( that whats happen with previous PUNTO CONSUMPTION JUMP FROM 32.4 TO 35 MPG ON 1.2 8V ENGINE) engine just need seetle like always.

Better petrol but no difference at allso come back to standard unleaded...
So far town consumption 26.8 mpg with average speed 11m/h ( short distance in town only)
Trip to Norwich city 38.2mpg with average speed 64m/h .290 miles done with small trafiic when coming back .
Now about 1200 miles on the clock ...
Looking forward for another 1000 miles and improvment of consumption...just a littlebit but shuld be soon...