So I have an '89 Buick whose power steering system hasn't been touched in a very long time (still works fine though). I believe the manual specifies regular power steering fluid, but the fluid currently in the reservoir is red (probably ATF). Has anyone ever switched one out for the other, and did it make a difference? I'll probably just leave it alone, but if I did a turkey baster fluid change I'm wondering which fluid to put back in.