>>511432742
oil doesnt need to be energy positive to make plastics and grease, we also dont need as much as you think, pic related. fun fact though, castor oil was considered superior to early petrolium based motor oil, thats where castrol got its name. it used to be castor oil. 2 stroke enthusiasts still run it in their engines. At a small scale its perfectly possible to make brand new ford model Ts that run on gasoline made from wood and use castor oil as motor oil and pig fat as grease.