Only Red antifreeze type is suitable and you’ll need 8 liters of it. For sufficient use of Peugeot RCZ you need to use suitable antifreeze. It’s important to provide cooling for Peugeot’s engine with 1.6 liters volume. In other way 2011 RCZ won’t be used quite long and efficiently. It’s better to choose fluid in combination of 2013 year, 2.0 volume of motor and engine code of RHH(DW10CTED4).
It’s obvious that every RHH(DW10CTED4) motor needs good service as stated by Peugeot in instruction. So better use Peugeot’s advice for servicing 2012 RCZ. Providing you keep the rules 2.0 motor installed in RCZ of 2010 year will be long lasting. If you choose other than Red coolant or use less than 6.2 liters, you can’t expect normal work.