[deccan]

Okay, this is not PBW. This is in fact single-player and in Propoertions, but anyway..

I was sending out colonizers far and wide and worried about my ships running out of supplies. So I made a long-range Version of my colony ships equipped with efficient Versions of engines and I was pleased that they could go a long, long way without running out of supplies.

It took me a while to realize that since using efficient engines dropped my colonizers' movement to 1, I might as well have just let my movement 2 colonizers run out of fuel and limp along.