How long does it take your car to warm up?

[Porsche9]

Originally Posted by Lew

Porsche 9, If just starting and left on idle, maybe it would double your driving time warm up. My VW Jetta TDI manual says don't exceed 28 hundred RPM's till operating temp is reached. I feel it's just best to let the cars engine reach the proper operating temps, especially in extreme cold temps. Shucks, I don't do well till I warm up.

When driving any car I don't exceed 2,500 rpm until the coolant is up to operating temperature and then I just double the time/distance before exceeding 3,500 RPMs to get the oil up to operating temps. Idling just takes longer, wastes gas, pollutes more then necessary and exposes the engine to below operating temps for longer. The engine just doesn't produce much heat at idle.

The owners manual specifically says not to let engine idle to warm up. It actually recommends to drive the vehicle at moderate speeds and avoid engine speeds above 4,200 rpm during the first 5 minutes. The TDI may be different but check the owners manual. 2,800 rpm on a diesel is pretty equivalent to 4,200 on the Boxster.