I am wondering why your late-model Camry's oil is pitch black after only a few thousand miles(?).I have always DIY replaced the filter whenever the oil is changed. I was taught by my father who was a chemist and mechanic to change oil/filter every 3,000 miles or 3 months. Other than cost it is not harmful. Occasionally it gets stretched to 5,000 but due to using a full synthetic it does not stress me out. One of the added benefits of DIY is that I can visually inspect the engine and undercarriage and spot trouble early on. I am often amazed that at 3 months and only 1,500 miles of city driving the oil is pitch black.
Actually, 30 years ago the 1989 Corolla owners manual specified oil changes ever 12 months or 10,000 miles for normal driving conditions using conventional oil. And the Corolla back then had a carburetor.Vehicles run MUCH cleaner vs 20 years ago.
Also, the oil is MUCH better vs 20 years ago.