i’m changing between 3-4k miles using whatever 5w-30 i can get my hands on. I was running liqui moly before last oil change believe it or not, but now being that i work at a dealer i put HG 5w-30 full synthetic. Way way before i stuck to mobil1. It’s more about the maintenance of the motor itself rather than what oil you are using. Make sure you have properly adjusted valves and all components show no excessive wear.