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At -30°C many cars won't start. This is an extreme situation. But it does seem like the Mirai should be able to start: https://insideevs.com/reviews/460274/202

by _hypx 4y ago

At -30°C many cars won't start. This is an extreme situation. But it does seem like the Mirai should be able to start: https://insideevs.com/reviews/460274/2021-toyota-mirai-test-drive-review/ https://insideevs.com/reviews/460274/2021-toyota-mirai-test-...

theshrike79 4y ago
Many cars will start. Gasoline engines will start if the engine is in good order and the 12V battery has enough juice to crank the engine to get a proper spark. Diesels will have some issues because the oil is too thick when frozen, but if the 12V battery is in good shape you'll usually make it. You do need to run it for a good while to warm everything up before actually moving. A hybrid (non-PHEV) Prius will start like it's a summer's day. It uses the drive battery + engine as a starter motor, so it'll just go. The oil in Priuses is so thin it doesn't really change viscosity due to weather that much. EVs have zero issues. Step in, push button and it'll take about 4-5 minutes for it to be nice and warm inside without any preheating. Sauce: have started all in -30 to -35 weather every winter. I'm actually excited for the biggest motoring magazine over here to do their winter test on a Hydrogen car. They don't pull punches for anyone - Teslas for example have huge issues with heating during extreme colds, some valve in the engine freezes over and the heat never gets in the cabin.
- _hypx 4y ago
  A hydrogen car should also start too. I am just pointing out that this is a hit or miss thing at -30°C.
  - theshrike79 4y ago
    Definitely should, but I've seen zero independent reviews stating so - which is a bit suspicious. There are a TON of winter tests for journalists, all organised by the car maker. There are also a bunch of buff articles and videos about hydrogen cars in cold weather conditions. Also manufacturers aren't pushing H2 cars too hard in Canada or Nordics/Scandinavia either. It's all just Californian sun or the parts of Europe where -5C is especially cold.
    - _hypx 4y ago
      I'm sure they've tested it in extreme conditions. They just have gotten around to marketing it. Don't read too much into it.

by _hypx 4y ago

theshrike79 4y ago

Many cars will start. Gasoline engines will start if the engine is in good order and the 12V battery has enough juice to crank the engine to get a proper spark. Diesels will have some issues because the oil is too thick when frozen, but if the 12V battery is in good shape you'll usually make it. You do need to run it for a good while to warm everything up before actually moving. A hybrid (non-PHEV) Prius will start like it's a summer's day. It uses the drive battery + engine as a starter motor, so it'll just go. The oil in Priuses is so thin it doesn't really change viscosity due to weather that much. EVs have zero issues. Step in, push button and it'll take about 4-5 minutes for it to be nice and warm inside without any preheating. Sauce: have started all in -30 to -35 weather every winter. I'm actually excited for the biggest motoring magazine over here to do their winter test on a Hydrogen car. They don't pull punches for anyone - Teslas for example have huge issues with heating during extreme colds, some valve in the engine freezes over and the heat never gets in the cabin.

_hypx 4y ago
A hydrogen car should also start too. I am just pointing out that this is a hit or miss thing at -30°C.
- theshrike79 4y ago
  Definitely should, but I've seen zero independent reviews stating so - which is a bit suspicious. There are a TON of winter tests for journalists, all organised by the car maker. There are also a bunch of buff articles and videos about hydrogen cars in cold weather conditions. Also manufacturers aren't pushing H2 cars too hard in Canada or Nordics/Scandinavia either. It's all just Californian sun or the parts of Europe where -5C is especially cold.
  - _hypx 4y ago
    I'm sure they've tested it in extreme conditions. They just have gotten around to marketing it. Don't read too much into it.