Right okay, if they didn’t then it’s not the end of the world anyways. Toyota recommend 0W-20, many people run it on 5W-30 oil because of how hot they run the car and the viscosity of the oil would thin down due to the temperature regardless. I have a 5 litre bottle of 5W-30 sitting on the side for when the car runs out of oil (which it loves to drink) so when I decide to run the car hot the oil can handle it better. 0W-20 is prone to freezing in very cold temperatures during the winter as well which can cause sluggishness and reduced efficiency. Trust me, a legit dealership will never use another aftermarket companies parts, I’ve never heard of it or even seen it on the news or anything. If you’re so worried, why don’t you go on YouTube and watch something is done and do it yourself. At the end of the day you bought a car that requires more than the average maintenance, if something goes wrong related to the work they have done, you can hand it back and they will fix it at no cost. Once again, we go back to company media protection. Sent from my iPhone using Tapatalk