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Caveat: For cars not equipped with automatic start/stop, the starter and possibly the battery might not be specced for it so it could cause additional wear. Cars with start/stop systems often assist the process with precise camshaft position measurements and the ability to squirt fuel pretty much right away so the starter doesn't need to do as much work.
Also don't do it with a cold engine - it's better to get the oil up to temp faster, it'll also reduce fuel consumption as the engine heats up.
When it's cold it can be beneficial to let the car idle for about 15 seconds before moving, to get the oils moving. They don't usually need much more than that, unless it's very cold of course.
Also cars will warm up faster driving around minimizing wear while engine is cold. Just don't stomp on the gas go easy on it
Indeed! It's a balancing act. It's good to wait a while right at start, but then it's better to go than wait on idle.
Yeah, I wouldn't recommend long idling*, but I also wouldn't recommend shutting down the engine for short stops when it's cold. Just keep it running if you're stopping for less than 5 minutes.
* Where I live, the winters can get to around -30C, though normally it won't get colder than -25. You'll want to let your car idle for a few minutes because otherwise it's not going to be blowing any warm air at the windshield, and your visibility will be shit.
Yeah. When you're down into those temps you've got to keep your car starting in a multitude of different ways if it stays outside anyway. But generally, just starting and rolling out instantly could cause wear. I'd not really say it's anything to be worried about though.