even if your pretty diligent you still only get like 3-4 chains before you gotta replace the works. but that is usually a good long time.
Well my brand new trek cruiser eats chains for breakfast,I only get about 800-900 miles on one chain,I just replaced one 1.5 months and its already half worn.1/32 elongated.Even though I replaced the chain in time its still wearing the teeth a little.Its no big deal because a chain for me is only $5.00 ate ace hardware.