ERDTLT In cold weather.

With the colder weather, to me, it is very annoying to have the cold engine start and run for a few minutes to warm up the battery.
It is called ERDTLT (Engine Running Due To Low Temperature).
I know who hard it is on any engine to do a cold start and then shut off before ever reaching operating temperature.
The additional engine wear and the condensation in the engine is very bad for the life of the engine. The cold engine oil absorbs the moisture and is carried through out the engine.  If the engine was to run for a longer period of time these would mostly be eliminated by the heat of the engine.
You, get that gunky mayonnaise paste in the upper engine oil cavities from the high moisture forming inside of the engine. This is very undesirable in today's engines due to the close mechanical tolerances in the variable valve timing and speed proportional oil pumps and other delicate timing situations that occur in this engine.  I want to minimize cold start engine cycling situation as much as is possible.

At Gm-Volt.com this has been discussed, Any-way-to-stop-the-engine-from-running-so-much-in-the-winter/page3 .
The idea is to keep as much of the cold air getting to the Volt's temp sensor which is located behind this same grill, covering the lower air inlet on the front grill of the Volt.
The folks who have blocked this grill report a 4 degree improvement in the temp before the engine starts due to ERDTLT.
I have decided to give it a try.
I inserted 1/2 foam pipe insulation over the lower front grill vent area.

This is how it looks.

Now to see if it helps