<P> The least refined type which produced by Solvent Refining . It usually consists of conventional petroleum base oils . </P>
<P> The least refined type which produced by Solvent Refining . It usually consists of conventional petroleum base oils . </P>
solvent extraction method of refining is adopted for which group of baseoil
solvent extraction method of refining is adopted for which group of baseoil
conventional petroleum base oils
conventional petroleum base oils