[rotorwrench]

When I was in the Army, I learned the proper interval for a maintenance operational check or MOC. A motor vehicle, whether it's a wheeled vehicle, a tracked vehicle, a boat, or an aircraft, should be run up every 14-days. This is considered maximum time out of service or the vehicle has to be prepped for either short term or long term storage.

If a person does this, the systems will remain usable and in good condition for a lot longer than those that set too long. Fuel doesn't last very long now days so it's very important to keep it fresh.