Thermal characteristics of eight crude oils and their treatment with a
dditives were studied by differential scanning calorimetry (DSC), ther
momicroscopy, viscometer and pour point tester. Different additives we
re found as more effective for different type of crude oils depending
on the wax content. Crude oils showed a reduced pour point after treat
ment with additives. Effects of different additives were also discusse
d by analysing the DSC curves and thermomicroscopy result.