I'm a nut, a Chem E who reads
www.bobistheoilguy.com for fun
You ask the question that no one asks. Dealerships have big bulk barrels of oil of various viscosities and they just draw from them. You are kidding yourself if you think the Toyota dealership uses individual bottles of Toyota branded oil. For the one "free" change they did on my 2021 RAV4, they used 0W-20 instead of the manual stated 0W-16 because they told me "they are the same thing". They added 5 quarts, overfilling it instead of adding 4.8 qts in the manual because "no one checks their oil and a little extra is good"
I've got an $80 set of Rhino ramps and maybe another $50 worth of tools and a drain pan and can do an oil change in under half an hour. Replace the darn crush washer too. I have a 5 gal jug I dump the old oil in and bring it to one of the auto parts stores for recycling.
I changed the oil at 750 miles, 1500 then 5K on my new car and do it every 5K or 6 months. Each oil change costs me about $45 for the car I spent $35K on.