New chain and sprocket?

[Gnasher]

This time of year and in the dry every 500 should do it.  Once the oils penetrated to the roller pins it will stay there for a good while, don't add anymore until the fling stops.  Then just a wipe with a unloaded brush on the rollers, not the side plates, the plates you can use a moisten sponge or thick rag.  You really don't need much at all, just a film on the rollers and on the roller pins