How often you change is very dependent on driving style, road conditions, engine wear etc. The best guide is the owners manual. And be sure to read the severe duty section. A lot more of us drive under severe duty than we think. Severe duty includes short trips, stop and go traffic, a lot of idling, hot weather, dust etc. It is not just a lot of high speed driving. Actually freeway driving is one of the best for our engines.
WIth the excellent quality oils now available, most serious mechanics will admit that the old 3,000 mile oil changeis overkill. But it is relatively cheap overkill and doesn't hurt the engine.
I use synthetics and have a mixed freeway, slow and go commute in SoCal. I would guess I am slow and go for about 5 miles of my 30 mile commute. I would say I am probably in the normal duty maintenance. So even with dino oils I should be good to go with the standard 5,000 mile change.
I am leery of extended changes even though I use syn. I did it a few times with other vehicles in the past and did not like the muddy brown color of the oil. usually my oil is a nice jet black when I change it.
The military also believes the 3,000 mile change is old tech. They now do changes based upon oil analysis and usually the interval is much longer than 3,000 miles. Do a search for AOAP if you want more details. Unfortunately the new websites are not as informative, or I haven't found the old page that explained the Whys and What fors.
The usual advice applies, follow the owners manual and be sure you know what maintenance cycle you fit under and use a good grade oil that meets spec.
Just my opinion,
Jim Henderson