$//<![CDATA[ \begin{array}{l}\displaystyle R_s(p, T) = \gamma_g \cdot \big[ \gamma_{API}^{-c_5} \, T^{-c_6} \, p_b^* \big]^{1/c_4}\end{array} //]]>$,  $//<![CDATA[ \begin{array}{l}\displaystyle p^*_b = 10^X, \quad X = (0.5/c_3) \cdot \left( -c_2 + \sqrt{c_2^2 - 4 \, c _3 \, \big( c_1- \log_{10}(p) \big)} \right)\end{array} //]]>$

$//<![CDATA[ \begin{array}{l}c_1 = 1.7669, \ c_2 = 1.7447, \ c_3 = -0.30218, \ c_4 = 0.816, \ c_5 = -0.989\end{array} //]]>$

$//<![CDATA[ \begin{array}{l}\mbox{Black Oil: } c_6 = 0.172\end{array} //]]>$, $//<![CDATA[ \begin{array}{l}\mbox{Volatile Oil: } c_6 = 0.130\end{array} //]]>$