I believe that oil is only a liability for the allies. For when Germany takes it they get paid, and the allies write the check. They do not adjust the starting income, but pay from it.

Pacific is about 2/3 water, so you get to practice using navy. It is quite good, I recommend it.

If you send some of the ships that take japans carrier fleet via anchors to N. Austrailia and consolidate with the Brownies, there is a somewhat sizeable flotilla lurking around the important areas of interest for Japan. If you keep a few boats at Pearl and place your purchase there, there will be another sizeable squad. This crew can then head towards Japan/Phillipeans. You box in the Japaneese, US to the northeast and combined with the Brownies around Austrailia and the B.S. and carrier combo to the west. This will force the Japaneese to engage at multiple locations and times weakening and open to the U.S. third wave.