Hi Norton friends, I`m a new member from Denmark. I Just bought This 1973 Commando 850 from the widow to the former owner. Its been stored for 20 years and I´m ancious fire it up, but I want to do it right. I managed to get a good fat spark in both sides and I will inspect the carbs. My questions are: What oil to put into it? all oil is drained for storrage. Best oil filter. How do I check the oil circuit, before start up? Can I run unleaded fuel or do I mix it with additives.