Flight-ER-Doc
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^ This is correct. All the blocks are set up for it but it's a pretty difficult install given the location.
Unless you're talking Alaska, Canada, or upstate NY, it's probably not necessary, and even then... I almost never use mine up here in Quebec. If you don't have remote start, I'd buy remote-start enabled keys and turn that on with FORScan before I installed a block heater. If you do, I wouldn't worry about it.
I agree. I bought my 2015 EL in Ottawa, Ontario and stayed there for a couple of very, very cold (lows -40F and below) without using the (supplied) block heater, or garaging the truck. It started up every time I tried (via remote), no problems.
Gotta love synthetic oil....