I do bring my K2 into my family room every winter. I always drain the oil, change the filter and clean out the oil tank. To clean out the oil tank I tape a folded up paper towel to a long stick and wipe the bottom. I always get some black stuff. Once it is inside I set a small pan under the engine drain hole and let it drip all winter. I always get maybe a full cup of oil in 5 months. Maybe not necessary but I like the old oil out. Since doing this I now let my cars drip overnight before refilling. Again, maybe not necessary. Thanks for reading. Dan