[hrench]

I recommend a motorcycle chain lubricant, probably one with molybdenum disulfide in it, such as 'PJ1'. They're designed to stick to high-speed chains where light gear oil won't.

Also, like the previous poster, I don't support ever soaking a chain in solvent to clean it. You'll never be able to get the lube back to the crevices where it was.

Finally, I've not had good experience with #25 chain. Go to #35 if you can. Also, WD40 is okay for a while, but it evaporates. In a month, it won't be there.

As for how often, if you can touch the chain and not get dirty, you probably need to lube again. I lube my motorcycle chain every third day.--200 miles. Oftener is more better.