Just a quick question to ensure that everything is correct:
On my 2009 Opel Astra I want to do a preemptive steering fluid replacement as the original fluid is quite old and is becoming dark. At the moment I do not have steering issues, but I was told that dark steering fluid indicates a stale fluid, causing excessive wear on the steering system.
Frowning the work and time involved, I do not plan to flush the entire steering system (pump, hoses, rack etc.). My plan is to suck it out of the reservoir, using a vacuum pump and a clean hose. After that I will top it up with fresh fluid bought from the dealership.
I am aware that I will have an certain amount of old fluid in the resulting "mix", on the other side the steering fluid should be "refreshed" enough to warrant this shortcut.
My question now: Do you think that my approach and my guesses are reasonable?
Turns out that the fluid is supposed to be dark, as it is emerald-colored when fresh. The old fluid, over time, turned olive green. I was able to extract ~300ml, the manual says that total capacity is 700ml. So I would need three runs to renew it to ~81% new fluid. Three runs, as the fluid gets sold in 1 liter packages.