Board Thread:Questions and Answers/@comment-64.222.129.69-20130609222213/@comment-5627887-20130610213007

According to figures found on the Oil Fabricator page as well as the Combustion Engine page, it takes 588kMJ to produce a bucket of Oil from the Fabricator. 12kMJ to refine it to fuel (so total cost 600kMJ to produce 1 bucket of Fuel), however Fuel will produce only 229kMJ / bucket in a Combustion engine. So it's not worth producing it at all, it's not even close to breaking even.