After much umming and arrhhing i decided to buy some red stuff from Halfords yesterday. £14 for 2litres concentrate
I'm going to be flushing out my cooling system anyway which i think has blue stuff in. Apparently the red stuff if for cars built after 1998 , are they making the assumption that all cars built after that date can use OAT tecnology, or that they have aliuminium blocks , who knows !!
Slight concern was that nissan wanted to sell me the blue/green stuff,but i'm guessing that some of you have been using the red stuff with no problems.