I was at a bike shop and four of the MX guys there told me they stopped using WD-40 on O-ring chains because it will eat away the rubber on the O-rings. They all switched to other lubes. They swear that the chains lasted a lot longer with other lube and no WD-40 being used. Claiming that it ate the O-ring away. I thought WD-40 would be safe on the Orings has anyone heard differently. Maybe the WD-40 is working its way inside the oring and breaking up the grease packed inside.