I looked at my TL manual and it doesn't mention when the power steering fluid should be changed. I also have the 30K, 60K, 90K mile service coupon with me from my local Acura dealership and the only fluids they replace are the motor oil, tranny oil, and brake fluid. Why is that?

 

The p/s fluid is probably considered a long life fluid so it doesn't require changing.
I've changed my p/s fluid a couple of times because when I bought the car, the original fluid looked a little dark for my liking (OEM Honda p/s fluid is almost colorless with a slight yellow cast, my fluid looked like new motor oil, more amber).
If you change it, use the OEM fluid only.

 

how do you change it?

 

With it being a long life fluid, (like the AT fluid) does the PS system need the same attention as the Trannie?
I am looking for the balance between good maint and not wasting $$ on wasted changes.

 

Not at all.

I would say a good time is around 100k miles, if you are picky 60k miles. ONLY use Honda power steering fluid....this is from experience.

 

I just vacuum pumped the reservoir empty (best if hot so any dirt is still in suspension) and then refilled it. I repeated this several times over the period I've had the car; the p/s system capacity is small. The fluid now is like new.

I would think the p/s fluid requires less attention (or none) because even though they're both designed to stay in the car a long time, the p/s is not subject to the heat and the debris (clutch material, etc.) that a tranny will create. P/S fluid is simply being used as a hydraulic fluid.

 

The biggest problem with PS fluid is that its hygroscopic; it will absorb water (from the air) which really messes up its properties. Don't open the cap on the res if you don't have to.

 

Is STP Power Steering fluid supposed to be put in with the original fluid?

 

I wouldn't try anything but OE Honda fluid.