Oil!

Ive noticed lots of timelines that involve oil being discovered earlier, in Japan, Libya, Siberia, etc..., but the same complaint of how logically it could be found and drilled is brought up. So what if say in the early 1900's advanced oil drilling technology and theories come about. It is ASB, but still. So now huge deposits are found in Alaska, Sakhalin, Siberia, the Middle East, Libya, etc.. by WWII. How will this change everything? I can see some nations being richer (Japan and Italy) and also more effort put into different theaters, such as a more dedicated push by Germany to get to the Saudi oil fields or a more convincing reason to attack Siberia for Japan, or even better, a Japanese Northern offensive aimed at Alaskan oil.
 
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