Best oil for chain?

A gool lube on a clunker would be Finish Line One-Step as it's a cleaner and a lube.

I used to use Chainl # 5. But now I just keep the bottle and top it up from a 5L bottle of halfords mineral gear oil which is identical (including the great smell !)

wd40 will wreck your chain

I clean my chain with WD40 or GT85, cloth and an old toothbrush and then apply the wax stuff I got for my motorbike. It's a little heavy duty for a road bike but is great for my racing BMX or for my mountainbikes. Because it's designed for a motorbike it sticks to the chain well but as long as you leave it to dry properly it doesn't accumulate crud and is very suitable for off-road use.

Happy using Green Oil. It's a wet lube so it does get dirty, but cleaning it off is easier than others I have tried (that goes for my fingers too). I try to degrease my chain as little as possible and have found that a few tiny squirts of WD-40 and lots of rubbing with an old t-shirt cleans it up nicely, ready for a fresh application of Green Oil.

This is my fave at the mo:

Having tried many different oils and waxes over the years I've settled on Purple Extreme for the good road bike and fixed, Finish Line Cross Country Wet lube for soggy, muddy rides with the MTB (the only type of mtb ride in a Scottish summer, I find) and Shimano Wet Lube for the Alfine Commuter and winter/ training road bike. Never apply too much, just a drop to each link. Degrease and clean chain after a couple or three applications. Might look at that Chain-L though.

This is a point many argue on.... After years of experimenting, measuring wear and usability in all conditions have come to the conclusion that applying oil myself is never as good as kmc chains come stock.
I want to know what oil the kmc chains come with as stock, appears to be lighter oil locked in with heavier outer oil, like the top pro mechanics do, i have tried no better chain (and lube) on single speed, road and mtb (use kmc sl9, sl10) anyone know what the mechanics, like contador's and kmc themselves use??? road cc team???

i used to use the Green Oil stuff, which is good but then i got some of that Chain-L, and that has got to be the best stuff going, lasts for ages. its eight squid for 4ozs. but seems to last for ever..http://www.chain-l.com/

For my mountain bike during the winter Part Tools Polylube 1000 grease is my preferred choice. During the summer (by summer I mean dry conditions and not the typically poor conditions we usually get) I use a GT85 spray.

For my road and commute bikes I use Polylube all year round.

What kind of bike? road, mtb, fixie??

What kind of cycling do you do? i.e. commutes, sportives, just general rides??

Do you go out in all weathers?

There are so many oil's and lubes out there, you need to be a little more specific with what you use your bike for

But for me, Weldtite TD2 Plus dry lube/oil is my lube of choice