Solvents of differing dielectric constant were used to extract oils from the seeds of rubber (Hevea brasiliensis0, melon 9Colocynthis culgaris) [Citrullus colosynthis], fluted pumpkin (Telfairia occidentalis) and oilbean (Pentaclethra macrophylla). The aim was to examine the effect of solvent polarity on oil yield and oil properties. The oils were extracted under Soxhlet conditions with the following solvents: petroleum benzene (60-80 degree C), cyclohexane, isopropyl ether, ethyl acetate, tetrahydrofuran, propan-2-ol and acetone. The oils were characerized by acid number, iodine value and colour intensity determinations. The oil yields of each seed in different solvents ranged as follows: 58.0-64.4;(pumpkin), 56.1-59.1;(melon), 40.6-48.8;(rubber) and 35.4-43.3;(oilbean). The equilibrium extracting capacity of each solvent was found to depend on the nature of the oil and the polarity of the solvent. Both factors were found to determine the acid number, iodine value and colour intensity of each oil.