Yes, the OnePlus 150w fast charger perfectly supports oppo65w. Because both OnePlus and oppo use the supervooc charging protocol, the 65w of oppo is seamlessly supported, and there is no need to worry about overcharging, because if the oppo phone that needs to be charged is 65w, then the use of the OnePlus 150w charger can only activate 65w. I hope this helps.