A couple of ideas for you. I assume you keep your TC inside of some type of shelter which prevents that fuel from getting "outside" cold. Also I believe your tank is under the hood which will help warm the fuel once the engine warms up and let it warm up to op temp before putting it under load. Put your tranny in neutral and put a little toe into the hydro pedal and set the cruise to help warm up the tranny at the same time. Your injector pump recirculates fuel back into the tank which helps warm that fuel too. To get away from the additives, I have been using premium diesel fuel I obtain from the bulk plant on the north east side of Bremen. I have not had any problems since using it for the last 8 years, but only use it during the winter and go back to off road diesel during the summer. If there is a gelling problem, you will see it cloud up in the fuel bowl around the filter. Good luck.