Greasing Up the KitchenAid
Here is a review of mixer grease from amazon.com. The author swears by Tri-Flow for your KitchenAid.
It seems that teflon is the magic ingredient in mixer grease.
I picked up a K5A in great condition at a great price and it has a few years on it, so it's probably about time to think about a lube job for it. I also need to check the condition of the brushes (this is easy to do and they are easy to replace). There are videos on YouTube which show you how.