There is more to an oil change service and some important things to know about preventing oil sludge. Oil eventually starts to turn into jelly, petroleum jelly called sludge. Sludge clogs oil passages and keeps oil from getting to some areas of the engine, causing parts to wear out prematurely, which means expensive engine repairs. That is the first reason you need to change the oil and oil filter on-schedule, to discard the old oil before it becomes sludge.
Your manufacturer will have a recommendation for how many miles you can go between oil changes. The detergents and other additives in the oil eventually break down, so the manufacturer may also have a recommended number of months between recommended oil changes. If your vehicle came from the factory with synthetic oil, the recommended intervals assume you continue to use synthetic oil.
How you drive can also have an effect. Most owner's manuals will have a list of driving conditions that are harder on your vehicle, which may include conditions like stop-and-go traffic, short trips, driving in extreme weather conditions, heavy loads, and towing. If this represents some of your driving, you may need to change your oil and do other maintenance on a shorter schedule.
Some vehicles have an oil-life calculator, which factors these conditions and tells you when to change your oil. Otherwise, talk with your service advisor here about how you drive and get their recommendation. Last, if any of the steering or suspension parts can be lubed, your technician here can take care of that with your lube, oil, and filter service.