Can I mix the advance auto honda formulated power steering fluid with the oem?


I go through like a bottle every 3 weeks of the honda stuff and the advance auto is cheaper until I order my new rack

 

I don't see any harm in it. I wouldn't do that type of stuff with oil or "brake fluid" tho. I've topped up my ps fluid with oem Honda unsure what was in before no ill affect. besides you'll be flushing it out I assume when you replace that rack.