I have had several cars, which have all been "sporty", fuel economy has never been a requirement.
Now it is. So I've bought a little 1.2 petrol which gives me 65mpg on the motorway/highway and 40mpg around town.
The car weighs a shade over 800kg and has 165/70/14 tyres on as standard.
I'm wondering if it's safe to fit narrower tyres, and maybe even increase the rolling radius to further improve fuel economy. I understand narrower tyres offer less grip, but during my current need for fuel economy I'm driving well within the limits and being very gentle with the car.
Any thoughts / advice is much appreciated.