The Spice Rack is intended to spice up the vanilla game by changing some well chosen details. Most changes can be disabled individually. Change basic oil processing to output petroleum gas and additional heavy oil. Sulfur is obtained from heavy oil. Chemical science is not necessary for robotic technologies and can be omitted (configurable)
Small changes concerning balance, gameplay, or graphics.
Please post problems or feedback here:
https://forums.factorio.com/viewtopic.php?f=190&t=99053
or
https://github.com/jodokus31/factorio