Automatic chain oilers?

[the Ferret]

On my two one week CB trips, 2000 miles and 6 states each trip, I carried a small can of chain lube under the seat, and lubed the chains once mid week each trip, each time because I rode in the rain. They don't need constant lubrication. Being internally lubedand sealed by orings, most of the chain lube you spray on the outside is to prevent rust.