The Briggs & Stratton 13kW PowerProtect Oil Warmer Probe with Harness ensures that your 13kW generator starts smoothly and reliably, even when the mercury falls below 30F. The oil warmer maintains optimal viscosity, eliminating the need for oil draining during cold weather startups. Cold weather generator accessories keep your home generator ready to perform when the temperature dips below 30F outside. The oil warmer allows your 13kW generator to start seamlessly in cold conditions.