Based on the pour point (-40 C). unless it get close to -20, you would be fine. It depends on how far into Maine you are. Might be good, might not be. If you use a block heater you are fine.
I know in my part of Taxachusetts we see up to -10 below & colder in some parts. For me Rotella (a dino oil), would not work to well since you are getting close to the boarder line pumping temp.
I have block heater but never use it since I never remember. For me, you should not need one unless you livewhere the temps are so low...you get the point.
