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gathermewool t1_iurc12e wrote

Reply to comment by Maximum_Poet_8661 in 30 minutes of car preheating in sub-zero conditions produces as much particulate emissions as driving 97km in a gasoline car, or 20km in a diesel car “These findings do not suggest to stop preheating cars; instead, we could reduce the emissions by using similar methods that are in place for engine” by giuliomagnifico

Good point. The only time I idle to warm up is while clearing ice and snow off the car. The heater may not put out a ton of heat, but the rear defroster (and front in my vehicles) will get the melting started while I work on the rest of the vehicle.

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