Did local refining affect bunker-fuel depots?

Did variations in local refining quality affect where and how bunker fuel was stored?

Not greatly; bunker fuel was low-grade, cheap, and broadly uniform, so storage requirements were fairly standard.

Bunker fuel was one of the least refined petroleum products. Its quality varied less in strategically important ways than more refined fuels. That relative uniformity made it cheap to obtain. It also allowed broadly standard storage arrangements across imperial bases despite differences in local refining capacity.