Depending upon model year, you may or may not have a threaded port on your engine block that very quickly accepts an easy to install and very effective block heater available through Kubota and through reputable after market manufacturers. Earlier models (mine is a 1982) lack such a port. If yours is a similar earlier model, please refer to a new separate thread that I posted today on the subject. I operate my L345DT in northern Maine and start and use the tractor frequently at temperatures between -20 and 0 degrees Fahrenheit. I do not have a block heater. My most valuable cold weather start-up tip, other than a block heater and a strong battery, is to run synthetic oil in the winter. I use Shell Rotella T6 Synthetic 5W-40. You also have to be patient with the slow heat-up of the engine glow-plugs before hitting the starter. Hope this helps.