tl;drThe order of "engine" and "electric engine" should be switched or altered
WhatReplace "engine" with "electric engine" or "basic electric engine"
Replace "electric engine" with something else. "engine", "advanced electric engine", something else.
WhyThe current order of research and manufacturing implies that an electric engine is more complex than a conventional engine. Imho, this is not the case. Also, as to my best knowledge, a electric engine does not recquire a lubricant to work. Most conventional engines do. So that does not make too much sense.
Sorry if this has been suggested before, my search did not find anything.
I am also fully aware that this is a rather low priority problem and does not really affect the game to much.
I am also aware, that there might be electric engines more complex than basic conventional engines.