https://images.search.yahoo.com/sear...g&action=click
plenty of charts, videos, and other ways to keep it straight. I use the plastic jug, makes it easy. 6 gallons of gas to one pint of oil. Or something like that. It can get confusing. I keep a gallon of oil onboard the boat, a mixing jug with 10 gallons worth of oil ready to dump in. I add the oil first, then add the fuel( I always need at least 10 gallons of fuel). When it sounds like its getting full of gas, i stop, add in however much oil I need beyond the initial 10 gallons worth, then give the gas pump one more good squeeze to wash the oil into the tank.