It is a profit item, not a service item.
If it is not listed in the owners manual, it is not needed, with one exception. Often transmission fluid changes are not listed in the owner's manual. With an automatic transmission I recommend a fluid CHANGE along with dropping the pan and cleaning the filter, every 30-40,000 miles.
Radiator flush should be in the manual for every two or three years, same with brake fluid.
Are you going to one of those quick oil change places?