Oil on pistons?

Ugg that hurts to hear this. I will change the oil asap! What oil would you recommend to maybe help get the rings to reseal if there is any? Also on the jet sizing the stock jets are primary 70s and secondary 74s how far do I need to go down? I have a kit that goes down to 64s
atleast 15 gotta run good gas
I will redo the timing when I get new oil and change the jets