I have a Caswell-lined fibreglass tank and wondering if I should, or need to, remove fuel mix while storing over the winter (Canadian) and if so, should I replace it with something or okay to leave empty. For my street bikes I just top up tank and add a bit of stabilizer. I asked my neighbour who owns a boat and he says it should be fine if it's treated/lined as it protects from ethanol. Thanks in advance.