Mildred Definately suits the Pious!
As for your Aygo ago go ago go ago go..
1. Ditch the rev counter- the time to change gear is when you hear the valves bouncing off the bonnet
2. What's the tank size? my cousin gets about 400 from a tank, and drives it like she stole it..
3. Do you intend to " run in " the lump gently, or perform some Italian Tuning to it?
I seem to find cars that get a decent thrash for first 1k miles loosen up more and are more responsive to drive- working at a car hire place teached you this!