What sort of mpg should i be getting on a 1.2 5door mk2 clio? I recently had the cat changed as it had split on the flexi, so it's gone up from then but i'm still only getting around 40-42 and that on motorway miles. Is this normal? Is there anyway to make this better? I've seen some that were near 60! Will it just go up with more driving? I've only done about 500 miles on the car myself but i reset it just before getting onto the motorway and ended up with 40 mpg.