3 ms·
Warming up the whole car (including grease in wheel hub bearings, for example, that becomes much harder in cold) takes a lot of energy, so perhaps it is it. I'd
by Arech 4y ago
Warming up the whole car (including grease in wheel hub bearings, for example, that becomes much harder in cold) takes a lot of energy, so perhaps it is it. I'd say that a fully warmed car though should be a bit more efficient due to a bigger temperature difference and a bigger oxygen amount going into cylinders.
- lazide 4y agoPeople drive differently in really cold weather - they tend to idle the vehicle more (and spend time in it while idling more), drive slower, and on mushier surfaces (snow/slush/ice), etc. and that is without figuring mechanical stuff like thicker oil. If someone isn’t driving highway distances all the time, ‘warm up’ is quite inefficient for ICE vehicles, and tends to run very rich. Totally right that if those factors aren’t there, it should get better fuel economy.