Engine Heater Worth it?

[ProjectM96]

I am not worried about having trouble starting it.

On Car Talk, they said using an engine block heater or a blanket will make your engine last much longer because it reduces 95% of the wear on the engine.

And they said that most wear on the engine occurs at start up because the oil is thick and cold, so for a very short moment, the engine is running with no or little oil during that start up.

So this question is more for reliability purposes for long engine life. The coldest temperature I ever noticed in my area is 9 degrees Fahreinheit, which was winter of 2010 around the time I bought the car. The average winter peak temps are 20-30 degrees Fahreinheit.