Mine needs a litre-ish top up every 2500-3000 miles or so, generally every 3 months or so......which I keep on top of and normally top it up every 1000 miles to keep it near the top dip stick mark. I change my oil every 6 months too. Magnatec 10W40 in the spring, and 5W40 in the autumn.
I have a nearly 90k 53 plate 172 Cup, that I think has had a hard life lol. It did have a full (not all Ren) service history which I looked through at the time of leaving the deposit, however the garage I bought it from 250 miles away forgot to put it in the car when I collected it, and when asked they kindly posted it......which I never received.....and basically they couldnt be arsed to find out why even after many a heated (read: abusive) phonecall.....grumble grumble.
Think from what I have heard from this thread and several others RenaultSport engines have varying degrees of tollerance quality......some are good with oil, some are bad......and then some are really bad.....esp the ones that arnt serviced regulary.