Not sure what climate you guys are in, but I would not leave that in over winter. From what I hear, there is no "antifreeze" in it. It can freeze/crack block/destroy water pumps/etc. I remember reading on this forum about it. Some guy had it in over winter. He thougth it would be a good idea to fire it up to get everything warmed up. Didnt think that it would be frozen..... Destroyed his water pump and much more.Coolant is coolant. I'm running water wetter in my bike and it works fine.