[cmiovino]

For us US folks, this just means don't mix the blue "super" coolant that comes in these cars stock with Subaru's older green coolant.

I prefer to keep the same coolant in the car it came with. Green with green, blue with blue. For twins, that means just using the blue super coolant always.

Keep it simple.

(Supposedly the blue super coolant is backwards comparable if you do a full flush. Always felt Subarus were weird with coolant and it was best to stick to the original.)