Yes it works just fine, but there are plenty of 5w30 synthetics that flow like crazy at negative temperatures. Regular vanilla Mobil 1 5w30 has an excellent cold viscosity as does Pennzoil Ultra.
What 0w30 are you looking at? Some 5w30s will actually be thinner than a 0w30 until you get really negative on the temperature. You will need to look at the viscosity index and the kinematic viscosity to compare.
I noticed there are not many choices out there for a 0w-30, Even less because I dont buy any Exxon-Mobile products.(personal preference)
Liqui Moly has one as does Castrol it seems.
LM and Castrol are both much heavier A3/B4 oil grades.
In an OTC 0W-30 there is only one in the States and that's M1 AFE 0W-30. And in your PA climate, as has been mentioned there are 5W-30s that are likely as light on start-up. Three examples would be Pennzoil Ultra, Havoline and Formula Shell.
Of course if you engine has been back spec'd for 5W-20 then a 0W-20 would be the way to go.
The 4.0 V6 is spec'd for 5w30 unlike some other Ford engines that were back spec'd to 5w20.
I'd use a 0w30 or 5w30 synthetic in it with confidence. My friend had a 2001 Ranger with the 4.0 V6 SOHC. We ran SynPower 5w30 in it and it was extremely quiet until he sold it with over 200k on it.
I personally haven't, but a now-deceased member of explorerforum always used Amsoil 0W-30 in his 1999 Explorer with the 4.0L SOHC (same engine) in his quest for 30 MPG.
You don't want to use 20-weight anything in the Cologne V6s, but no problem with 0W-30.
That one would work just fine, but if one is looking at a fuel economy type 0w-30 (i.e. M1 AFE variety), then that Motorcraft 0w-30 isn't a fair comparison. Given its service category, it's HTHS will be basically on par with products like GC 0w-30 and Mobil Delvac Elite 222 0w-30.
If you're dead against EM products, I'd use Amsoil 0W-30 SSO. Castrol SYNTEC 0W-30 is a great product and I'm running it now, but it's not energy conserving and would defeat the point in service in your vehicle. Otherwise don't bother with a 0W-30 and just use a good syn 5W-30. Havoline Deposit Shield Synthetic has excellent cold cranking specs and is on sale at Advance Auto. And I'm not sure where you're getting this is supposed to be a cold winter especially. Everything I've seen is El Nino will result in a milder one. But who knows?..
Weather bureau just announced last week another polar vortex is likely. To the OP's question, Amsoil SS 0w-30 or Mobil 1 AFE 0w-30 are your 2 best choices. You can run both of these all year, no need to change to a 5w in summer.