Start car and run engine to avoid freezing problems - good idea?

In what countries and why ?

For example Austria - because of the noise and for environmental reasons. (Apart from being pointless).
Hence many people buy a parking heater to heat up the engine and the car before they drive in the winter.
For example here: [broken link removed]
 
In many countries which have a "proper" winter you can specify a fuel-burning pre-heater which warms the engine coolant and provides demisting etc. from the off.

Some BMW diesels have a Webasto one fitted, for example, but in the UK and Ireland it only works when the main engine is on. For those of you with a BMW you can get a mod. from dealers which allows you to start it remotely to provide pre-heating prior to starting the engine.

SSE
 

I assume it might depend where its parked. Front of my house seems especially exposed to the wind. If you parked at the side of a house or sheltered by trees it might all the difference. Also some cars have bigger batteries than others.

I waited till after lunch and the battery actually had come back to life a bit, it was probably frozen solid when I tried it earlier. The web suggested that low batteries freeze at around -6c. Colder than that last night. Got a really long set of jump leads so I didn't have to move the car and it started first time.

Apparently after reading up on it, there are actually different batteries you can get. Perhaps they are standard fit in colder countries I dunno. Theres a rating Cold Cranking Amps (CCA). And you can get heavier duty batteries.


So you can get heavier duty batteries and even some with extra insulation etc. Again I dunno if these are standard fit in other countries. Insulation blankets and other devices are more common elsewhere. Also found the following.


I remember years ago people putting blankers and similar over engines at night, especially on equipment (not cars) that was hard to start.
 

Theres something about a pre heater in my VW manual. Only available in certain markets. I had forgotton about it, till you mentioned that.
 
Theres something about a pre heater in my VW manual. Only available in certain markets. I had forgotton about it, till you mentioned that.

Friends of ours (who live in the Jura mountains) have a preheater on their VW Sharan 2.0 TDI, had one on their previous Sharan 1.9 TDI. It's actually fitted on all BMW 3.0d engines, I believe, but you can't start it separately unless you get the fix from a dealer. They used to look at us funny when we said we had to run the car for a while on cold mornings to clear the screen, they just blip the preheat on, finish their cornflakes and coffee and drive off. Mind you, they have to have winter tyres on from Nov-April too!

SSE
 
Some of the MG ZTs had this as an option. Also the Rover 75s. Possibly on the cdti Bmw engine derived models?