I never lube my chain and nothing bad ever happens to mine an I live by the sea! Changed mine on trialsbike every 3 months or so. (KMC Kool) On bmx, Had the KHE collapse on for around 4 months now, no obvious signs of wear...yet. Should really change chain everytime you break it really because it stretches. I would rather spend £30 on a reliable chain, than £6 on an unreliable chain that will probably result in over the bar supermans