A bike I have in for servicing has been fitted, by Halfords when last serviced, with a Clarke "non-oil chain" - allegedly Teflon coated etc. The chain is as dry as a bone with some minor surface rust . . . The machine is a cheap-ish Boardman MTB that doesn't get ridden off-road further than grassy fields.
Any thoughts/views on these chains - the combination of Clarke products and Halfords reeks of snake-oil to me!