Heating garage

I have a blower in my garage that runs off the oil to keep the garage at a certain temp during the winter. I have it set for about 45 right but not sure if that is too high? My boiler, water softner etc is in a room off the garage. My bedroom is also above the garage along with a bathroom. Up until this past week it has been in the 50's by itself. Am i keeping it to high or just right?

It depends, are you keeping your firewood in the garage?

I usually keep my garage at 50-55. My boiler, softener, weater heater are in there. I'd imagine with the garage heat turned off it would stay warm enough to not freeze though.

Yes i only bring a couple of days worth at a time

Ok, good. The reason I ask is because you post this in the woodshed forum, I was just trying to confirm the link between oil heating your garage and firewood.
My garage is separate from my house, and functions more as a shop. I have a wood stove in there that I use to heat it, but since I'm not out there all the time, most of the time I only try and keep it just warm enough that things don't freeze, and that requires getting a fire going in the stove every other day or so, so the effective temperature range fluctuates between +33 F and +90 F.

didn't know where to post the question....so the answer to the question is to keep it above freezing which is usually not a challenge but last week was