ok, my 172 is two at the end of May. Last night, i jusyt tallied up what it has cost me so far. This includes servicing, tyres, the 6k oil changes, brake pads (front), but not petrol, insurance etc etc obviously. It has cost me £648.12. Now, its due for a 24k service, and a new set of front tyres, so all in, on its 2nd b/day, it would have cost me just under £1k to run.
My Golf GTI, by comparison, cost just over £2k for six years motoring. So, take into account inflation etc, and the Clio doesnt work out too expensive to run.
g