Michael M. wrote a review of Dumonde Tech Original Bicycle Chain Lubrication on April 29, 2009
never use anything else. I ride 4000+ miles per season, commute to work, race, and train. Using 1 4oz bottle between 5 bikes I've gotten over a year from it. Really, you wipe down your chain, apply, then forget it until it makes noise (just like the bottle says) and I get about 200 miles between applications.
best stuff on the market. It can be found for way cheaper though.