I just did my oil change the other day in my garage... it's super easy and i was able to take the oil filter off by hand (didn't have to jam a screwdriver in the side of it).
i bought my oil and filter from Packey Webb on Ogden just east? of Belmont. They gave me a good deal on oil and filter, you could go there if you don't want to do it yourself. why don't you want to do it yourself if i might ask. I'm right near 7 bridges by the way, i know we had this discussion already haha.
I will have to say no, they are NOT all seasons.
Edit: dang @thirdgen89gta beat me to it!