High quality: WTI is considered a "light sweet" crude oil, which is much easier to refine, though Brent is a mixture of crude oils, together with both equally "gentle sweet" and "weighty sour" grades. Screening is by references that POs inquire one another for, not by released evaluations or from https://arlinkdirectory.com/listings13238158/how-much-you-need-to-expect-you-ll-pay-for-a-good-outcall-massage