Due to the high significance of crude oil to modern society as a source of energy and as raw material for a wide chemical and petrochemical industries; in this study. we evaluate the characteristics of certain Yemeni crude. and fuel oils specifically Mareb crude oil blend. Masila crude oil blend plus two samples from Sounah and Hijah oil fields in Masila basin. https://pipingrockers.shop/product-category/clay-powder/