Here they say do not use wd40, internet is full of various tests where o rings and x rings were immersed in wd40, for months and no damage observed, so who is laying Correct, do not use WD40 , you require a lubricant and not a water dispersant. ( WD ) The internet is full of lots of things including angels , aliens , ancient giants and talking cats . You do what you believe to be right and good luck to you . Meanwhile I'll keep my chain smothered in good quality chain lube . I was thinking about using wd40 for cleaning purpose before applying lubricant, not using wd40 as lubricant