long life engine antifreeze

[spud123]

i own a 2008 maxum 2900se with twin bravo3 with 305 cu in fuelinjected
the anti freeze looks claen ( pink color, )tests show good for -35 celius
when should i consider replacing . and how easy to do change?

[mmwjr]

I would change it after 10 years.

There should be a drain plug but if not I would pull the lowest hose to drain it.