With the technology for everything ever changing. Mobil1 released a 20k oil. I decided to give it a try and I’ve sent the oil in for analysis. I’ve ran this oil for 40k miles. I changed the filters at 10k and changed the oil at 20k intervals. Back in the day wine the whole synthetic came out and 5k-7k oil changes I was like whattt no way and stuck with conventional oil til I actually understood synthetic and had a car that came with it from the factory.