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bufordt t1_iutq2im wrote

Reply to comment by colem5000 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

You'll have to forgive me if I believe the experts at the car manufacturers, Liqui Moly, Shell, and Esso over a random "mechanic" on Reddit.

From Consumer Reports:

>Modern cars have improved on technology to the point that your engine is fully lubricated within 20 to 30 seconds. By the time you get in, start the car, put on your seatbelt, and get situated, the engine might not be fully warm, but it’s completely lubricated and you’re okay to drive at this point.

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