Per manual page 107:
The Refuel options are:
1) Do Not Refuel - No refueling will take place
2) Minimal Refuel - Each ship takes on enough fuel to complete the present TF mission, plus approximately a 10% pad
3) Tactical Refuel - Similar to Minimal Refuel, but with a 50% pad
4) Full Refuel - All ships refuel to their maximum Endurance
#2 & 3 are new for AE and I think us players as a whole have not adjusted to using these options more often. Have you used them more, Brad?? IMO, bases like Christmas Island (Line Islands) are important to be built up to size 10 overall (stop spoilage). Then you can use ships (TKs and AKs) from the West Coast with low Endurance to move Fuel here, but have enough to get back to their West coast base without stealing from the Fuel they just delivered.
As Japan, I will try to set up the same thing. Can I get the Fuel from the SRA to Japan and return back to my Fuel source without needing to refuel?? If not, then I need to do more micro-management by setting those TF to "Minimal Refuel."
Overall, this game is still based in logistics. Whoever does this better will win. Protect your and deny your opponent his.
OK, off my soapbox now. [;)]