Talk:Spectre/@comment-178.20.23.171-20131011084446/@comment-9804140-20131014180235

The table above has the data.

Spectre was introduced before the extra thorium vault so maxes out at 2m per upgrade, although each of its top 5 levels require 2m. It also requires enough metal/oil past L6 that you'll need to either buy compression or build a 5th metal/oil storage.