I really never had any vendor show hop oil numbers. I noticed Yakima shows that with some of their hops. Makes perfect sense for consistent production. My favorite IPA uses about 1.15oz/gallon. My stand varieties are equal weights of Columbus, Centennial, Falconer's Flight, Amarillo, Simcoe.
I dry hop with Simcoe, Amarillo, Cascade, and Citra @ 1oz/gal for 8 days.
Speaking of this, time to make another batch!