I have an older Jiffy 3HP, it has a chart on the tank, I believe (I'm not going out to check) its 5oz to the gallon. IOW, 24-1. I used to add Stabil, but now all the better 2stroke oils have the fuel stablilizer added already, (read the label to make sure yours does). I have been useing the hand auger so far this year, but I got the old Jiffy out today and gassed it up and it started on the 2nd pull, its about 15 years old, weighs a ton, but couldnt be more dependable.