0NachoMahma 10 years ago ReplyUpvote. As a rule of thumb, most ICEs will have their own lubricating system. Unless that "screw" is the crankcase plug, you shouldn't need to put any lube in it. . As a rule of thumb, screws are fasteners and, if they require any at all, will only need lube during installation. . My thumbs are getting sore.