Kind of a complicated question actually.
At sea level there is 14.7 psi pushing on everything. If you can create an area with less than 14.7 psi, liquid will flow there.
A pump that creates a perfect vacuum can lift water approx. 32.2ft. Since oil is lighter than water, (SG=0.86, approx) you could lift it approx. 37.5 ft.
Does that help at all? What are you trying to do exactly?
At sea level there is 14.7 psi pushing on everything. If you can create an area with less than 14.7 psi, liquid will flow there.
A pump that creates a perfect vacuum can lift water approx. 32.2ft. Since oil is lighter than water, (SG=0.86, approx) you could lift it approx. 37.5 ft.
Does that help at all? What are you trying to do exactly?