I don't believe in extended service intervals or fluids that last forever so I do a lot of services at 50k. I'm at 52k miles and the PS fluid was brown and smelled burnt. I replaced it with Idemetsu PS fluid. Steering is firm now like it was get I got the car. I just sucked the fluid out of the reservoir with a 12v pump, refilled, started the engine and turned wheel lock to lock. Did that 3 times and fluid is clear. I normally I hook the pump to the return line and suck the fluid out of the system while refilling the recovery tank but couldn't find an adapter to fit the hose. Hope this helps. This is a pic of the dirty fluid. Next on the list is the transmission. I'm hoping I can do a fluid exchange using the clloer lines in the radiator. That worked great on our Sienna.