What do most of you do for winterizing your tractors. I use my bx2370-1 for mostly now cutting grass and have around a half a tank of fuel in it. I do not use it much as spring planting and plowing under garden. Is there a specific additive to be added to fuel, which is mainly why I have not refueled tank to be full. Even when I refiled the next time I have a funnel system to filter out water.