I had asked the same question a few months ago. I had been just running the fuel out of the engine and wondered if there was more to it. One person said that he disassmbled the carberator and sprayed the parts with silicone. I haven't done that as of yet but might next winter for storage. I do disconnect the batteries to try and avoid the "black wire desease". For winter I remove the batteries and store them in the refridgerater in a sandwich bag (not the freezer). These are Nicads and Nimhs. I do not know about Lipos. I don't know if it helps or not but I also pull the spark plug and give it a little shot of oil and then flip it over several times with the cylinder in the upright position so that some of the oil will go into the crankcase. I can't resist flipping all of my engines over once in a while to see if they are getting hard to turn. I haven't had a problem so far with storage but I keep my planes in the basement in the winter so they are not subjected to extreme heat or cold. When taking them out of storage I cycle the batteries and check them out. If I even suspect a battery is going bad it's history. You may get a lot of differant responses to question and I will be watching to see if I can pick up any additional information. Bill