Top quality: WTI is considered a "light sweet" crude oil, which happens to be much easier to refine, when Brent is often a combination of crude oils, which includes the two "light sweet" and "major sour" grades. Screening is by references that POs request each other for, not by published https://zion14q89.blogofchange.com/36188615/top-latest-five-oil-urban-news