Originally Posted by sweeks

I basically agree with you, but when something that is applied to a dirty chain is claimed to "actively push contamination out of the chain", rendering a dirty chain cleaner "as you ride", it cranks my skeptical sensibilities up a few notches. I'd need to see a mechanism for this "push", and maybe some independent testing data before I'd believe it. Meanwhile, there are many good chain lubes... and at the end of the day, unless they run in fully-enclosed oil baths, chains will wear out (even then, they'll eventually wear out). They're easy to monitor for wear, easy to change, and cheaper than gears.