Below 20 degrees you will have problems running on straight #2 fuel. It will gell up, not want to pass through the fuel filter. Some tractors are more sensitive to this, others not much at all. For example, one tractor I have with the fuel tank over the engine that I plug in for cold weather starts has the fuel filter right above the tank heater. With all the heat hitting the filter & the fuel tank, it works fine on #2, really wouldn't need an additive.... If you buy fuel in cold weather, your fuel might be a mix of #1 & #2. This will work at a colder - unknown - temp. You can buy straight #1. This will work better in cold weather, but costs more, has less power, less lubrication, and is harder on the engine (runs hotter) if you keep it until summer & burn it in warm weather. It is closer to kerosene. If you don't know what fuel you have & the temp is to get near 20 or below, use an additive the prevents gelling, _and_ you need to get it in the tank and run the engine a while before it gets that cold! You need the #1 or the additive already curculated through the filters & pump & all _before_ the cold hits. It also is a big help to replace the fuel filter before winter season, allow as much flow as you can through the filter. I use Power Service with #2 diesel (sometimes a little #1 added) here in Minnesota, seems to work. It's what is sold here, don't know if others are better or worse. --->Paul
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