I'm going to do a P/S fluid flush and I don't mind spending a little extra money on Honda brand fluid. The bottles I've seen for sale have different labels; grey, black, and blue. Are there differences between them? I know MT fluid formulas changed over time, so did the P/S fluid change too?

 

As far as I know, all of the honda genuine P/S fluid should be the same. I think they just updated the laabel (and bottle caps) over time? I had a similar issue with the brake fluid (which i use in my clutch) and saw something similar