Truck Winterization Checklist

Start winterization before the first hard freeze in your operating area — typically September or October for northern routes. Do not wait until you are caught in the first cold snap. If you run year-round across different climates, maintain winter readiness from October through April.

Standard No. 2 diesel begins to cloud at around 14°F and can gel solid below 0°F. Winter-blend diesel (available at most fuel stops in cold regions from Oct-Mar) is treated to resist gelling to lower temperatures. Anti-gel additives provide additional protection. The best strategy is to use winter-blend fuel AND add anti-gel when temperatures will drop below 10°F.

Extended idling wastes fuel ($5-$10/hour), increases engine wear, and is banned in many states. Better alternatives: APU (Auxiliary Power Unit) for heat and electricity, diesel-fired bunk heater (Webasto, Espar), electric shore power at truck stops, or a quality sleeping bag rated for the expected temperature. If you must idle, use the lowest RPM that maintains heat.