Your owner’s manual will have a recommendation for time and mileage, but you need to remember that it’s based on using the recommended weight of oil. And if your vehicle came from the factory with synthetic oil, the recommended intervals assume you continue to use synthetic.
Also how you drive can have a big effect. Most owner’s manuals will have a list of driving conditions that are harder on your vehicle. Things like stop and go driving, short trips, driving in very hot or very cold weather, heavy loads and towing. If some of your driving fits this, you may need to change your oil and do other maintenance on a shorter schedule.
This may sound complicated. Some vehicles in CA have an oil life calculator that takes all of these factors into account and tells you when you should change your oil. Otherwise, talk with your CA service advisor at Murrieta Auto Repair about how you drive and get her recommendation for when to take care of your service.