I have never had a gelling problem in my tractors down here in FL but haven't had as much fuel on hand in the past as I keep now. I already put biocide and lubricity formula in my fuel so I figured and anti gelling additive wouldn't hurt. I got a bottle of the Power Service anti gel and cetane booster and put in all my tanks today. In the 55 gallon drums I just stuck the pump nozzle in the vent hole and ran the pump to circulate and mix. I fired off the generator and both tractors and worked them all up to operating temperature for a while to mix the additive in those. Also topped up all the tanks. I am down to a 1/2 drum of spare fuel so I need to get a delivery and start over pretty soon.