—Information accurate as of: build Devblog 64
Mid Grade Fuel is currently not implemented in the game. It was said to be going come out soon, but the last news heard were on devblog 64, June 2015. There are plans to put it into the crafting recipes of high-end objects, as well as being an improved fuel source.
It is meant to be a higher quality version of Low Grade Fuel, and may be used to power higher-level devices such as generators and electric lights.
Crafting 10 Mid Grade Fuel takes ? seconds and requires: