i have a mag .61 f stroke

i run cool power 15%
+ i add 2 / 2.5 oz of castor
what the castor does is it makes the oil content 20%
which is recomendedby certain mfg except o.s.
8/9 bucks for a bottle of castor is just a litle piece of mind


and i also run the same fuel in my saito fa .82 f stroke
no problems so far after 5/6 gallons...