I'll throw my two cents with something I noticed the other day. The 3 liter takes way longer to warm up just idling than the 5 liter. It was about 28 degrees out the other day and I started it and left it running in my garage. I only expected to leave it for about 10 minutes but ended up getting a phone call that make it more like 17 minutes. Naturally I expected to open the door to a blast of hot air. Uhhhhhh not even a little.
The vents were all on high, including the rears. Looked at the temp gauge and the thing only a quarter inch if that, off of full cold. I was shocked! By time I pulled out of my neighborhood, it was fully warmed up so just a minute later but it was under load.
My 2012 definitely wasn't like that. So I'd caution 2014+ owners to experiment and see how long it takes yours to warm up at idle. Personally, I couldn't see spending $1000 on a system that only gives me a luke warm vehicle after waiting that long and burning that much gas.