If you need a good lube use a nice high temp lithium grease. Its not water soluable and will stay on for quite some time. If you dont feel like using grease though you can just wrap the bar with a bunch of teflon tape. It lasts longer and is a hell of a lot less messy. No need to bother going to a marine speciality store for any of these since they can both be found at any auto or hardware store.