Sorry I didn't clarify that. I only use a couple of small drops and only after a couple of flying sessions on my models. Some times the retracts have sat around in a dry climate and can dry out the o-rings on a new set. Once it is all hooked up it is basicly a sealed system except for the exhaust and that is where you will lose the lubrication so it has to be replenished . I have a set of rhoms on an old Platt Spitfire that have worked perfectly for 20 years. Don