Hi all.

I am gonna share a discussion with you all that,s bin up here during the winther. Should you let your engine warm up a bit before driving?perhaps the time it takes to scrape off ice from the Windows. Or remove ice first and then just start and go?

The side on the start and drive made the following points.

1. The catalyst converter don,t work till the engine is warm and therefore will pollute more.

2. The engine doesn't warm up at idle but has to work before getting warm.

3. You will delute your engine oil with petrol due to blowby(or undercompression as it,s called here). And incomplete burning(don,t know how else to translate it)

4. Many modern engines has a pretty low oilpressure at idle, to reduce internal mechanical drag. And therefore. The wear is bigger.

The side that,s for letting the engine idle while scraping of ice.

1 the engine will mostly need between 15-20 sec before being fully lubricated(Probertly mostly with older thicker types of oil and engines.

2. The idle at cold start is often pretty high. An example is my Mazda that idles at 2000 rpm at cold start. Therefore it incomplete burning ain,t that big a problem.

3. In favor of safety it is best if the car is free of any moist of the Windows before ddriving. It is hard when you do the start and go way.

So. What do all the experts here say? This winther has bin really mild. But a normal whinther we will have night temps down to -15--20 celcius..

I apologize if my spelling is bad. I am sitting up at night, becouse I have the pneumonia. On both lungs. So now at is tea and rum time:-)

Have a nice day.
Søren



Edited by shDK (01/20/14 07:54 PM)