I've been using Chain-L lube on my bike for the last 12000km or so. I apply it everytime it seems to need it, which is about when turning the pedals backwards by hand isn't smooth. In dry conditions this is about every 800km or so (I've yet to get the supposed 1600+km advertised). My approach is to rub chain with cloth, apply lube, leave it over night, ride. I've just come to accept that for the millage I do, I'm gonna get through chains, it's gonna need lube, but spending excessive amounts of time cleaning the chain is just not worth it for the return on investment. A KMC X10sl gets me about 4500km. I use the SL variant as it has hollow pins, which makes it a lot easier to make stuff afterwards with the chain. I currently am experimenting in a line of pendants and ear rings... I've been pondering asking a knife maker to try making a Damascus blade for me with a dead chain.
I am still on the original bottle of Chain-L. I have one more in stock, I don't know what I will do when it runs out, as I can't find it for sale in .nl, the bottles I have, I bought with me from the UK.
I'm also the sort of girl that just accepts that from April through end of September my skin care regime for my legs is going to involve applications of black gunk from the chain... This year I've started early, with chain gunk on both shins already...
J