Coolant life - Buspass
I have just disposed of my 10-year old 2 litre Renault Mégane RXE automatic (and for the francophobes, it has covered over 90,000 miles and, apart from the usual service consumables it has needed one wheel bearing and one ignition coil in that time. Last month it went the length of the Alps to Provence and back on half a litre of oil and still had the original exhaust system and rear brake linings).

I have replaced it with a Renault Grand Scénic petrol 2.0 litre auto and am puzzled by the new service intervals. Now the book specifies a glycol based anti-freeze. The Mégane used glycol, and the coolant changed every 20,000 miles or 2 years. The Scénic however requires coolant changes at 70,000 miles or seven years. -- yet is still apparently on a glycol-based fluid.

Can anyone explain, please?