Clio 200 Cup
Worked out the mpg rather than using the trip computer. 33mpg!!
I got around the same when testing full tank fills against the trip computer!
Trip said 31mpg and tank full calculation gave 33mpg.
I did a 100 mile motorway run at a constant 80mph (130km/h limit here in France), on calculation from full to full it gave 36mpg, trip was on 34mpg. Quite impressed for moving along at a decent speed.