This is a list of countries by oil production , as compiled from the . Energy Information Administration database for calendar year 2016, tabulating all countries on a comparable best-estimate basis. Compared with shorter-term data, the full-year figures are less prone to distortion from periodic maintenance shutdowns and other seasonal cycles. The volumes in the table represent crude oil and lease condensate , the hydrocarbon liquids collected at or near the wellhead. The volumes in the table do not include biofuel . They also do not include the increase in liquid volumes during oil refining ("refinery gain"), or liquids separated from natural gas in gas processing plants ( natural gas liquids ). 
The . produced vast quantities of military equipment into late 1945, including nuclear weapons, and became the strongest, most technologically advanced military forces in the world. In addition to out-producing the Axis, the Allies produced technological innovations; through the Tizard Mission , British contributions included radar (instrumental in winning the Battle of Britain ), sonar (improving their ability to sink U-boats ), and the proximity fuze ; the Americans led the Manhattan Project (which eliminated the need to invade Japan). The proximity fuze, for example, was five times as effective as contact or timed fuzes and was devastating in naval use against Japanese aircraft and so effective against German ground troops that General George S. Patton said it "won the Battle of the Bulge for us."