Well what NY is bringing to the table is very interesting...
Tolson if don't need the seals conditioned it might not be required to use a High Mileage oil then, but would definitely give a shot at one of the High detergent oil to clean out the oil passages. Also you can try 5W20 instead of 5W30. Being in Northern MN you will see a big difference on Dead Cold start... Being from Montreal we are about at the same Parallel and we know what a cold winter morning can be like.
Not to be that guy but you would see zero difference using a 5w-20 instead of a 5w-30 in the cold. Part of the reason oil is confusing to people is these numbers get mixed up.
You can pick any number for the first part 0w,5w,10w and you should indeed choose based on where you drive but most areas and at some point this will be very common place I would choose the 0w no matter the place you live. It will shine the most in very cold areas however. The second number 20,30,40 is the number you should stick to what it says on oil cap or what is recommended. The manufacturer picked that oil because it is great at operating temps for that engine.
To summarize. Cold weather pick 0w-20 or 0w-30 depending on what was recommended i.e. use 0w-20 in a Ram that came with 5w-20 and 0w-30 in Ram that came with 5w-30.
0W oils usually are the very best oils made by the brand and tests prove that. The 0W provides the very best cold startups which even if you live in Florida and gets down to let's say 30F it will still protect the best on startup which is where most wear occurs even on a perfectly functioning engine.
