Oil
If it is not that cold, you can mix summer and winter oil to get a viscocity somewhere in between the two.
I have used house brand oils for years in many applications. Just be aware that because XYZ makes Walmarts oil in the east for eg, that may not be the case for what is sold in the west.
My Dad used to be the Plant Manager of a Texaco facility where they made among other things chain oil for both theirs and others labels and he told me that the oil used for all brands was the junk, production overruns and other waste they could not use for anything else, so it was bottled with some color and a tackifier to make it winter or summer variety, and sold as chain oil often at a huge markup. If you can get a motor oil at a big discount, you probably are getting a better lubrication than chain oil, which as I said already, is junk.