Nissan Altima to another dealership to get a basic service?

Can i take my Nissan Altima to another dealership to get a basic service(oil change)i prefer the ford dealership i have been going to for my other car.

You CAN if the Ford dealership is willing to work on a Nissan. You can take it wherever the hell you want. Some Ford dealer service departments will only work on Ford products while others will work on any make/model. You have to ask them. Since you generally have to call to set up an appointment, why didn't you just do that?