I mentioned on another site that I dump the old oil then fill up the engine with the least expensive synthetic I can get to pick up any acid residues and other junk. In the Spring I dump that which comes out quite dark change the filter and then fill up with liquid gold. A comment was waste of money ($12 CAD or $8-9 US is not much cant buy a 12 pack for that here) and the reason it comes out so dark is that the aluminum reacts and changes the colour over the winter months.
This has worked well for me but maybe I should just do the whole change in the fall and save the $12, any thoughts?
