EZ30 200k service recommendations

[damien.kal]

Hey everyone I have a 200k service coming up on my Auto Spec B.
Currently thinking about doing the following:

Gearbox Fluid
Coolant
Engine Oil and filter
Diff oil front and rear
Spark plugs
Possibly brake fluid depending on its condition.

Just wondering if anyone has recommendations on fluids to use and/or whether I should do anything else? Considering maybe doing the belts.
I have also heard that using anything other than Subaru Coolant is a bad idea, anyone support this claim or think just any high quality coolant will do the job?

[Bennis]

Definitely a new serpentine belt if it has not been replaced recently.

And while you have the belt off, check the idler pulley and tensioner pulley for any noise when spun by hand. If they make any noise when you spin them, replace either the bearings (cheapest but needs a press) or whole pulleys (easiest). They both use the same pulley, about $50 per pulley at bursons. Nuline EP048

Even if your belt is fresh(ish) and does not need replacing, I would check those pulleys!

[waynieRS]

following as im unsure of what oil to use for front and read diff aswell

[jimmyP]

Definatly do those Serpentine pully bearings if they're original.. They will die soon.