Oh. Thank you, I did only check the direct translation indeed. Learned something today. :) That oil is for lubrication, the petroleum is the real, main fuel an

Oh. Thank you, I did only check the direct translation indeed. Learned something today. :) That oil is for lubrication, the petroleum is the real, main fuel and the highly flammable aether is needed to be able to ignite at all at the comparably low temperatures you can produce with cranking. Too high compression and the first firing will see a too high counter force to continue, too little compression (that screw on top of the cylinder head) and it won't ignite...