I use 7W; huge difference between 7W and 10W. See below for a shade tree, cave man shock press; can be used to push oil out and pull oil in. I have a MytiVac and prefer it for pushing the new oil in TQ style.:s
BTW, I don't drink Miller Lite; poor excuse for a beer. I prefer Shiner Bach but have to keep some of the Miller swill around for my brother.:cry
Awesome homemade press! Looks simple enough to make. Completely understand the inferior swill for unexpected guest dropping by while keeping the good stock on hand for self! :s