Related Products listed by product feature

The knowledge base explains how to create “related products” by adding each product manually to a block. I have 15k products, so this is not feasible. I’ve also tried creating a filter w/ the feature in it, but I want to list products not available features.

My products are “related” by a product feature that i created. I’d like for the product detail page to show products with the same feature in the right column and it shouldn’t be category specific.

So for example: The user clicks a category “Ford” and selects the product detail page for a “mustang”. On the right hand column there would be other sports cars (product feature), listed from all categories.

Can anyone point me in the right direction?