High Quality: WTI is taken into account a "light-weight sweet" crude oil, that's simpler to refine, although Brent can be a blend of crude oils, like both "light sweet" and "significant sour" grades. Screening is by references that POs request each other for, not by posted opinions or from other https://maps.app.goo.gl/VhAGTRCDGTuVhHJa8