Merkur is going to exchange the bridge and top cap of my Futur as the blade can move after the top cap is snapped in, and there's slightly more bladed exposure on one side. Naturally, that side gives a closer shave with much louder feedback. Their instructions state that the threads have to be oiled with "thin machine oil". I've read that Johnson's Baby Oil which is just mineral oil and fragrance would suffice, but others state that 3 in 1 oil should be used.
This post from 2008 states that mineral oild will eventually "gum up" and shouldn't be used : http://badgerandblade.com/vb/showth...-lubricating-safety-razor?p=808874#post808874
This thread about lubricating the Merkur Progess seems to suggest mineral oil. Someone mentioned that Merkur's instructions state that adjustables should be lubricated regularly:
http://badgerandblade.com/vb/showthread.php/331471-lubricate-Merkur-Progress
This post from 2008 states that mineral oild will eventually "gum up" and shouldn't be used : http://badgerandblade.com/vb/showth...-lubricating-safety-razor?p=808874#post808874
This thread about lubricating the Merkur Progess seems to suggest mineral oil. Someone mentioned that Merkur's instructions state that adjustables should be lubricated regularly:
http://badgerandblade.com/vb/showthread.php/331471-lubricate-Merkur-Progress
The box in which your Merkur Progres came has instructions printed on the insert that holds the razor in the box, but I have my own bit to add. The instructions read as follows: "Clean the razor parts with EVERY blade exchange under warm water with a soft nail brush. Slightly lubricate the mechanical parts of adjustable razors regularly." I clean my Merkur Progress regularly with very warm water and liquid hand soap. Every so many months, I soak the razor parts in mineral oil which is messy, but at least mineral oil is non-toxic as it is taken internally as a laxative.