Product review (5 stars): KitchenAid Mixer Grease
Very happy with this product.  I live too far from any city to take my mixer for repair, but, luckily, a neighbor happens to be a machinist who agreed to change the grease in my mixer for me.  He did a great job, the grease worked perfectly, and my mixer is working just like new.  (There's a good video on YouTube that tells you how to change this grease if you want to try it yourself.)