Mixing hydraulic mineral fluid power steering? Advice
 

Hi folks. My Audi A4 power steering hydraulic fluid is low. I wanna refill it. But before I bought the part. I read about it. On the net I read it's not wise to mix hydraulic fluids. People should know the exact type of fluids before refilling.
I went to get the part. My cap says only hydraulic mineral fluid (g02000). I went to several places. All they got is synthetic fluids. Even some suggested its okey to mix. But never wanted to listen to their stupidity after reading the mistakes others have done.
I went to the dealer and the one I got is hydraulic mineral fluid (g04000)! I was told it replaced g02000.
I don't wanna mess things up! Is g02000 and g04000 the same or can they be mixed? Any advice will be well appreciated. Thanks in advance. Cheers

Thank you folks for not helping. You get 63 people who read your question and nobody is there to share experience. By the way I flushed out the one I had in the car which was red and replaced with the green one. I took the hard way cause I wanted not to take the risk of mixing it. Cheers