If you can get the vehicle started !
Block heaters & the best battery you can buy are important.
Synthetic oil helps, but you need to have it in the transfer case & differentials too, or have extra oil pan heaters !
Oh, & my garage gets really busy, when it's really cold.
Power steering issues, wiper transmissions, window regulators, batteries & heating/cooling system issues !
Yep, & all plastic gets really brittle.
